-fixed a bug where the JAP AI kept declaring war on the USA in late 1941. It wasn't comparing IC levels correctly, and so never realised there was no hope of victory.
Actually, taking away that hindsight advantage could be done in two ways:
i) Removing every single bit of historical scripting, so you won't know what to expect. Would that still be WWII? Of course not.
ii) Making the AI make all the minimax optimal decisions. Would that still be WWII? Of course not. Germany would probably be attacked by the Soviets at the moment they start going into France, which would have twice the strength as historical.