“Likewise for a supposedly omnipotent and omniscient God to suddenly determine that it would be cool or necessary to create a universe at a particular point in time while the idea had never occurred to him previously is clearly unworkable and is not compatible with anybody’s system of logic.”
You were doing great up until this point. Yes, God has given us logic so that we can inspect His handiwork and glean understanding about the universe, ourselves, and perhaps something about Him as well. However, to imagine that the logic we are given to understand this universe is equipped to give us understanding of anything outside this universe is a non sequiter. If God created this universe, then he must not be bound by it, and must be outside of it. So, we have no evidence that our logic is equipped to judge whether any of God’s possible actions or motivations are plausible. We can make some guesses, and hope that we are correct, but we cannot use our logic to draw a conclusion such as yours with any degree of certainty.
As nearly as I’ve ever been able to tell by reading, God works entirely within the laws of mathematics, probability, and physics. If you want violations of mathematical and probabilistic laws and particularly if you need them in wholesale lots, you need to be talking to the evolutionites, they specialize in that sort of thing.