I believe that God willingly gave up his omniscience when he gave us free-will. If the future is determined, then we don't have free-will. And, if God knows what we will do in the future, then the future MUST be determined. Finally, if the future is determined and we don't actually have free-will, we can't be held responsible for our actions by God, unless God is actually unjust/unreasonable.
The question is whether He had omniscience at any time. Because, even if He had omniscience eons before giving us free will, we would still have no free will, since He knew what He and we would do in the following eons. Willingly giving up omniscience when He created us does not help, if He knew before that what the future would look like.
So, if free will is identified as cosmic ignorance at all times about the future and our actions, then God never had omniscience to start with.
Therefore, if God is identified as something that has omniscience, at least for a while, then God does not exist. Or free will does not exist. Or, more plausibly, both do not exist.
Ciao
- viole