Now this is a question:
If you know everything across space, then don't you know everything across time? And if you know both then don't you know how interacting with space will change space over time? And if that's the case, then is there any way that a being with this entire set of knowledge does not predestine all of existence either by not doing anything, or by the various manipulations it brings about?
Free will is incommensurable with an omniscient creature of any kind; unless that creature 1) comes on the seen AFTER all of time plays out, or 2) that creature does not have the power to change salient parts of the system.
IMHO, God balances the universe in a way that best suits what I'm going to call 'ontic good' that is, a reality to good that is beyond the feelings and fiction of man. Further, I have no idea what all God balances or why. I also have no reason to believe that my concept of 'good' is the 'ultimate good' in the universe; though it does seem likely that our feeling of good is oriented toward (though not likely at all to be pointed entirely at) what is universally 'good'.
Interestingly, just because reality, good, evil and the like is a function of human storytelling doesn't change that there may-well be a greater ontic-good; and just because we don't know what that ontic good is doesn't mean that we can't tell stories that are aligned with that good: particularly given the predestination that omniscience on the part of god requires.