Please make the AI aware of the scenario goals. Currently it's too much focused on raiding rear areas and taking cities which are not objectives or just plainly moving in the opposite direction than the other side.
In 1815 campaign where the French objectives are to capture Brussels and Antwerp while not allowing to defeat Napoleon's army (the Allied goal) the Allies split their army into 5-7 small raiding units and rampage on the French rear, taking Lille, Paris (!), Verdun etc. while not sending any large units to fight Napoleon or worse to protect Brussels and Antwerp which the French can take easilly and win the scenario (that's what happened to me). So in fact the forces "switch place" at the game end with French in the north and Allies in the south which according to scenario conditions is of course a French victory.
The same happened in 1812 campaign (I played it only shortly because it was before the patch and the battle results were crazy), while the French advance on Minsk, Vilinius etc. the main Russian HQ (alone) sneaks between two French corps and heads west on their own while in the south front russian armies capture Zamosc and Warszawa ignoring the French horde steamrolling northern Russia.
Maybe too much "raiding AI" left over from AACW?