(yes, its a cheat, but without it player has a huge advantage.)
AI will no longer ignore assaulting if there are token armies nearby.AI is far more likely to remove provinces from HRE if they have taken them and are not in the HRE.AI now disbands landlocked armies after peace that is too hard to get home.AI is more likely to do more royal marriages when low on legitimacy.AI will no longer disband all its forces overseas in enemy territory at the end of a war, and they got transports.