Goodness is subjective and relative, and right and wrong are a hoax.
So God's choice cannot follow objective value but only his own subjective desire.
So why does God desire what he desires?
Whence God's utility curve, so to speak?
How can it be necessarily the utility curve that a necessary and perfect being necessarily has?
If that makes no sense, God cannot be a person, and he cannot choose a world, and he cannot prefer one thing to another.