Ukraine Crisis Hopes or on changes to a liberal democracy are fine, insistence really none of our business and dangerous — Benkei
Probably there would be some intermediate form of governments would last a few week each. As for the government to be sustainable, it needs an army ( which is being decimated in Ukraine right now ) and money, which also won't be there without foreign trade.
So trade partners would ask for liberal democracy and giving up nukes, to which sooner or later Russia would have to agree.
It is our business, as to prevent Russia from attacking other countries, and I don't see how it is more dangerous than allowing Putin's regime to stay in power.