Knowing what God wants doesn't force me to comply at all. And if I do choose to comply, I still choose how to do so. So I see indeterminacy in both.
First, I would agree that your proposal merely shifts the quantities and proportions of indeterminacy, ignorance, etc. That's why I'm wondering why it would be desirable.
Second, the indeterminacy is objectively reduced, for in the initial scenario there was indeterminacy about the command/end, the means, and whether to follow God's command. In the rock scenario the indeterminacy about the command/end has been eliminated, and so we are left with two kinds of indeterminacy rather than three. We will have to come back to this question about the third kind of indeterminacy: whether to follow God's command (for this is the Euthyphro point I spoke to).
The Devil knows God better than any of us do, and knows better what God wants, yet still freely chose to do evil, yes?
Yes, probably.
I dunno, I think the Bible actually does a pretty good job of defining what those sorts of vague commands mean (at least once you get to the NT). As a Christian, you're saying that you don't?
I think more generalized commands are less clear than more particular commands. It is much easier to understand a command to climb a rock face than a command to love one's neighbor, or even to not steal. Also, that last sentence of the quote you were responding to is particularly important, "Doubt seems to arise naturally in the practical application of these commands, their competition with one another, and their competition with other emotions, desires, and people."
To take a current example: are Christians permitted to receive Covid vaccines that have been produced with the help of aborted fetal cell lines? The answer is not at all clear. We have duties to oppose abortion, to promote a healthy society, to care for our families and loved ones, to not cooperate with evil, etc. There have been dozens of articles written on this topic in the last few months.
You don't know anyone completely, but that doesn't mean there's a problem with knowing that they exist.
We don't know anyone completely, but God is intrinsically beyond our capacity of comprehension in a way that is quite different from other humans. Also, the most basic way we posit a human existence is by perceiving the material form of a human. God has no material form.
We would be moving the sphere of merit to our choices instead of our beliefs.
I don't find this strong distinction between choices and beliefs very useful. I actually think beliefs entail an element of choice, but even if you don't, beliefs are still just natural fruits of choices made. Apples are just natural fruits of the apple tree. Saying that we critique choices rather than beliefs seems somewhat vacuous to me, almost like saying that we are evaluating the quality of the tree rather than the apple. The teacher who blames for a false belief is surely not blaming for the belief in isolation from its formation, but that is just common sense. A belief and the choices that led up to it are part of one integral whole. The volitional processes that formed the belief are included when we speak of the belief. Anyway, that's a bit of a tangent...
What is the purpose of doing the work to reach the answer that He exists? Other than, of course, to then do what He wants. And then what is the purpose of doing the work to reach the answer of what He wants? Other than of course to do what He wants. The sphere of merit would fall in the arena of whether our choices align with what He wants those choices to be and why we chose to comply or not.
In your math example, the purpose of doing the work to learn that 12x12=144 is so that you can do that same work in different situations for other solutions and other input. You don't have different situations with God's existence; learning that work is useless once you come to the correct conclusion. This is another area where your analogy falls short.
I don't agree with much of this. Apparently according to your logic the means are dispensable and God should have just created robots who "do what He wants," because apparently the only thing that matters is that we do what he wants. It seems like you are saying that God is concerned only with ends and not with means, no?
I think the math example you give really is analogous to the theological cases. The means really do form us in a particular way, and the means always have to be in due order and proportion to the end. Part of the point is building character and instilling virtue. I think the means are valuable and indispensable even in the case of searching out the existence of the Lord of all creation.
Let's take my thoughts to the extreme. Let's say that we all simply know that there is an eternal omnimax creator of the cosmos and we have a perfect conscience that isn't merely an emotional nudge one way or the other that can ever be corrupted, but that we know, in every situation exactly what the good choice is. What's the problem with that? I can still trust or not trust that God is going to reward or punish me for choosing the good choices or the bad choices, respectively. I might even choose the good choices for bad reasons and God can judge me for that. What good is eliminated in such a world?
There are a few problems. First, how could anything be meritorious if we had perfect knowledge of what was good and how to act? Why would we ever choose a bad choice? Isn't is a bad choice to choose good for bad reasons? Wouldn't that possibility be eliminated entirely? I mean, to give a weird metaphor, if you are going to build a tower you have to start at the base and build upwards. If everything is just handed to us then nothing is ours and we have no responsibility or dignity.
The other big problem is that you are really bulldozing the whole idea of diversity and multiplicity in creation, as well as its value. This is a rather big theological point that is so encompassing that it is hard to explain. We can poke a hole in the sky and get a glimpse of it by asking this question: if every person had a "perfect" conscience from the get-go, then wouldn't every person be exactly the same? Wouldn't we all do the exact same thing in every situation? A key point here is that good is diffusive of itself and therefore it is not constrained to a single path. There are many saints and each has a different personality, history, and set of choices that made them they way they are. In a real sense they created and shaped themselves through their choices and this led to a legitimate diversity of sanctity among people. Yet I don't see how this diversity would obtain if everyone was simply granted moral omniscience from the get-go.
Finally, I don't see why your solution wouldn't just reboot the initial problem. If we lived in that world then we would be having this exact same discussion about the people who know God's will beyond the shadow of a doubt and nevertheless disobey it and are damned. You would say, "Wouldn't it be better if God removed some of our indeterminacy of will and made it so that these people don't disobey God?" Or else, in a similar vein, Cvanwey would be asking why these people, who could not have acted otherwise, are damned, and his case would be much stronger in that universe.
Anyway, I know it's not entirely fair to criticize the model of free will you are putting forth due to the fact that you don't even believe in free will.
Still, these discussions may be useful in fleshing out more robust conceptions of free will.