Do you not believe in the existence of counterfactual information? Or do you believe the information exists, but that God just doesn't let it factor into His decision of which world to create?
Do you believe that God exhaustively knows what decisions you would have made if you had been born in another time and place? If not, then I don't see any principled distinction between your view of reality and the average open theist's view of reality. You both would argue that the nature of reality is such that God cannot know anything other than what He has decreed.
You're arguing for the existence of things that don't exist, and then falsely projecting an imaginary "inability" on God.