There are some considerations to ponder here, namely that you are bound to only have a few people who truly understand the democratic process, but I think a potential solution to the inefficiency and ineffectiveness of democratic enterprises could be the creation of complex democratic system.
The consensus-based decision making model, for instance, is something that a lot of people within the libertarian Left try out, which occasionally is lauded for the maximal stake that it offers its participants, but does quite often fail, as, anytime a decision needs to be come to, a meeting needs to be held for long enough for a consensus to be met. Certain Anarchists will tell you all sorts of things about it, even admonishing democracy altogether, an entirely nebulous enterprise, in my opinion, but that is more or less the inherent flaw.
It does work well, however, in small groups that don't have to make a lot of decisions. If you don't require an absolute consensus, if you somehow adapt to consistent minority opinions, as is part and parcel to the project, you can avoid the problem of that one or two people may repeatedly effectively veto any and/or all progress in this or that regard. Though I don't have any real experience within said organizations, I think that this is both fairly common and effective within small-scale mutual aid organizations.
In larger Anarchist organizations, attempts to institute a kind of pure consensus-based decision making model do quite often result in that, well, nothing gets decided upon whatsoever.
Once an organization grows to a certain size, there does seem to be a need to elect delegates, of which, one-member, one vote, seems to be the tried and true method. What doesn't necessarily have to be done is to consider the delegates as having been granted some sort of arbitrary authority over their particular organizational dominion. In the Democratic Socialists of America, for instance, of which, I would give the critique that there was a generalized disinterest in actually reading the by-laws, something that could raised as a point of contention to what I am offering in general, you would elect a chair and co-chair of each committee, the committees would have meetings and decide upon what to do, usually, after an hour or so long conversation,
via a standard vote, and the chair or co-chair would go before everyone at the general meeting, wherein there would be a set of discussions and then everyone present at the general meeting would then again vote, which I assume is according to its by-laws, but, as I didn't read them either, I don't really know. They have kind of an elaborate process of adapting so that the organization can live up to its name, but only really the people who have been there forever know anything whatsoever about it.
There is a lot that you could say either for or against the DSA, but I would generally contend that it is an overall pretty good organization.
Anyways, what I'm suggesting is that, in so far that a larger Anarchist organization, or just simply anyone else who is interested in participatory could do, in so far that they would like to adopt the consensus-based decision making model, is to create a dynamic democratic system wherein it could be utilized in small groups, such as committees, as well as for, perhaps necessitating certain caveats, certain key decisions, an example of which, to use the DSA as an example, could be something like both the decision to have endorsed Bernie Sanders and how to do so, as some people wanted to directly participate within the campaign undertaken by the Democratic Party and some people wanted to undertake a campaign solely within the DSA, as such a decision effects the overall direction of the entire movement. For practical considerations, however, such as electing a treasurer after someone leaves the organization, the organization could fall back upon the one member, one vote method.
I should, perhaps, point out that, for all of the extensive knowledge, feuds, partial alliances, revelry, and disdain that I have for the Anarchist fringe, I do have a fairly limited experience within actual Anarchist organizations, and, so, this is all really fairly speculative, as it's mostly just based upon what I've read online here and there from various parties for various reasons.
I guess that what I'm suggesting is that a dynamic and adaptive synthesis of various forms of participatory democracy could be applied so as to both maximize a individual member's stake within an organization and ensure a certain degree of effectiveness and efficiency. The key problem with this, which I have already pointed to with the DSA's by-laws, is that individual members may be unlikely to understand how a complex democratic process works. This, however, I think has more to do with interest and engagement than anything else. The DSA, for instance, became relatively popular due to the coordinated campaign in favor of the election of Bernie Sanders, but, despite a significant increase in membership, will probably return to the relative obscurity that it previously had. The reason for this, I think, though a paradoxical caveat to my being admitted to the organization as an anarcho-pacifist, is due to that it is a "big tent" organization. Anyone who is a socialist can be a member. I am an anarcho-pacifist who defines anarchism as "libertarian socialism" and, so, do qualify. You can also be a member of the DSA as a Marxist-Leninist or Maoist, at least, in so far that you agree to that it is a democratic organization whose socialist vision is also democratic, which kind of results in an endless standoff between the recent Libertarian Socialist Caucus and the more authoritarian marxists in the organization. People within the far-Left develop all sorts of ideas and notions for all sorts of reasons, and, so, I kind of understand their desire to effectively convert said people to some other variant of marxism, but, were I to create a political organization or movement, I would probably make the libertarian aspect of my aforementioned "libertarian socialism" requisite. Perhaps, that's a certain kind of personal preference, though.
Anyways, all of this is to say nothing of the structure of something like a corporation, however. Personally, I am emphatically in favor of prefigurative politics. I don't think that people who are in favor of participatory democracy can ever hope to establish it without practicing it within their own organizations. Libcom, whom you may not consider relevant outside of the libertarian Left, but are actually some of its foremost theorists, aside from, perhaps, the waning trend of Communization, are fairly pessimistic of this general line of reasoning, even to the point of being ostensibly opposed to it. You see this in their critique of
parecon. They generally think something along the lines of that only the establishment of libertarian communism, i.e. an effective revolution, insurrection, or near magical peaceful establishment of an Anarchist commune, can produce communist society, all of which is to emphasize that things like participatory economics, participatory democracy, cooperatives, or even mutual aid organizations can not cope with conditions under the current set of wealth and power relations that exist now, which they, in good faith, would just be willing to call "capitalism", which is not wholly untrue, the aforementioned
Mondragon Corporation being an example of theirs, but I think their line of reasoning is all-too pessimistic, if not indicative of a certain sectarian militant zealotry. If you go into prefigurative politics without any illusions of actually reifying communist society, as per the general idea, I don't think that such harsh critique is really necessary to prevent anyone from becoming delusional.
Alas, however, I have been boring everyone endlessly and still am not quite on topic.
Similarly to organizations of the libertarian Left itself, should cooperatives adopt a dynamic and adaptative democratic process, perhaps undergoing a fairly gradual transition to some form of economic democracy, then, I do think that, over time, the seeming need for a hierarchical structure, will more or less disappear. A small shop that is run as a cooperative starting out, I do think, just can immediately be established as a kind of pure cooperative and test and try and adapt to what it needs to as such. I do imagine that something like a book store, though ultimately requiring some sort of administrative decisions, can just be run as a cooperative from the immediate outset.
Let's say that Jeff Bezos becomes taken by the cooperative movement, deciding that it is the way of the future, and wants to transform Amazon into a cooperative. I would contend that, even Amazon, though it would probably look a lot different, can be run as a pure cooperative. Perhaps, that is a point of contention that we can discuss, however? What would seem to be unwise is to overhaul such a large company as such overnight. Bezos could, instead, phase in the cooperative elements over time, allowing for the chance to adapt and develop a dynamic democratic process without risking the wholesale bankruptcy of the corporation.