The BAI is (as reportet) just great. You realy have to think in the battles to win now. Its hard and if the chances arre even, the AI gives a damn good fight (i actualy lost battles!).
I just noticed that the BAI moves its arty a bit to much. Generaly it uses its arty very well, but sometimes its moves it after every shot.
CAI: Just great, just one thing: In the peninsula campaign: The Brits (me) got regions at the northcoast and the southcoast. The CAI got two Fullstacks (as i could see) which just moved everyturn one to the north and one to the south. The next turn they just reverted their direction and traveled in the opposite direction. Next turn they reverted again and so on for 10 or more turns.
I have to point out that the CAI and BAI even with this little reportet "problems" the best are which i ever saw in total war. The battles are magnificent. I got my best battle of all my total war battles since shogun I!!!!!!!!!!!!!!