Battle AI is on the same standarts as MTW. What it needs is to enhance the ability of campaign AI to produce and maintain high quality generals.

In MTW no faction would produce high quality armies. The camp. AI would not take advantage of its tech tree, but in RTW it will. The problem is that when the phalanx pikemen are frontal charged by my cretan archers and the archers win. Thats because my archers are under the command of a 9 star general and will fight to the last when the pikemen have no general to fight for.