Omniscience and omnipotence are nice and simple, but "morally perfect" is a word that hides a lot of complexity. Complexity comparable to that of a human mind.
I think this is eminently arguable. Highly complex structures and heuristics can be generated by simpler principles, especially in complex environments. Humans don't currently know whether human decision processes (including processes describable as 'moral') are reflections of or are generated by elegant decision theories, or whether they "should" be. To my intuitions, morality and agency might be fundamentally simple, with 'moral' decision processes learned and executed according to a hypothetically simple mathematical model, and we can learn the structure and internal workings of such a model via the kind of research program outlined here. Of course, this may be a dead end, but I don't see how one could be so confident in its failure as to judge "moral perfection" to be of great complexity with high confidence.
Edit: in fact, now that I think of it this way, "universe which follows the rules of moral perfection by itself" wins over "universe which follows the rules of moral perfection because there is an ideal rational agent that makes it do so."
By hypothesis, "God" means actus purus, moral perfection; there is no reason to double count. The rules of moral perfection are found implicit in the definition of the ideal agent, the rules don't look like a laundry list of situation-specific decision algorithms. Of course humans need to cache lists of context-dependent rules, and so we get deontology and rule consequentialism; furthermore, it seems quite plausible that for various reasons we will never find a truly universal agent definition, and so will never have anything but a finite fragment of an understanding of an infinite agent. But it may be that there is enough reflection of such an agent in what we can find that "God" becomes a useful concept against which to compare our approximations.
In response to your first paragraph,
Human morality is indeed the complex unfolding of a simple idea in a certain environment. It's not the one you're thinking of though. And if we're talking about hypotheses for the fundamental nature of reality, rather than a sliver of it (because a sliver of something can be more complicated than the whole) you have to include the complexity of everything that contributes to how your simple thing will play out.
Note also that we can't explain reality with a god with a utility function of "maximize the number of copie...
I am about to graduate from one of the only universities in the world that has a high concentration of high-caliber analytic philosophers who are theists. (Specifically, the University of Notre Dame, IN) So as not to miss this once-in-a-lifetime opportunity, I have sent out emails asking many of them if they would like to meet and discuss their theism with me. Several of them have responded already in the affirmative; fingers crossed for the rest. I'm really looking forward to this because these people are really smart, and have spent a lot of time thinking about this, so I expect them to have interesting and insightful things to say.
Do you have suggestions for questions I could ask them? My main question will of course be "Why do you believe in God?" and variants thereof, but it would be nice if I could say e.g. "How do you avoid the problem of X which is a major argument against theism?"
Questions I've already thought of:
1-Why do you believe in God?
2-What are the main arguments in favor of theism, in your opinion?
3-What about the problem of evil? What about objective morality: how do you make sense of it, and if you don't, then how do you justify God?
4-What about divine hiddenness? Why doesn't God make himself more easily known to us? For example, he could regularly send angels to deliver philosophical proofs on stone tablets to doubters.
5-How do you explain God's necessary existence? What about the "problem of many Gods," i.e. why can't people say the same thing about a slightly different version of God?
6-In what sense is God the fundamental entity, the uncaused cause, etc.? How do you square this with God's seeming complexity? (he is intelligent, after all) If minds are in fact simple, then how is that supposed to work?
I welcome more articulate reformulations of the above, as well as completely new ideas.