A description of God? Poetic Universe, and Uncanni, the interesting scenarios you describe are only part, in my view, of the panoply of different theologies that peoples and cultures worldwide, and during history, have and have had.
To some peoples it is as you have variously described and to others "god" is a quite small bit player. The elements Zhoubotong lists only refer to a subset of candidates for "God" even with a capital G.
In my opinion the word "god" is a job title (like "cook" in the "great houses") and the variety pans out from there, never to be exclusively pinned down.
The questions you Uncanni are asking are in cosmology, and physicists are doing a lot of maths on this, which is based somewhat on observations, albeit with rather sophisticated equipment. They feed into branches of philosophy like ontology, while philosophy of science (e.g in the need to continually pose more hypotheses) feeds into it. For those who are interested in religions which include these matters there is additionally a philosophy of religion angle.
The statement by Poetic Universe on quantum entanglement is inspiring, in the light of what (littlish) I know about it having dropped out of physical science for too many years, the features of reality give me much joy also.
Necessity, eternal, and existence (Poetic Universe), are vital and exciting questions, that come into "god" questions for some people, as well as having far wider relevance anyway.
Uncanni, we can and must choose what images to accept or not, nonetheless I took the OP as inviting a general survey. To my mind the answer is staggeringly general and diverse. Wayfarer touches on this and I would further add that in those religions which are supposed to be deeper, there may sometimes be a duty on leading members to help members to not obscure truths from the public when or if they would be helpful.