I want an AI that maintains freaking battle lines. In RTW the enemy army comes at you piecemeal and you can take out units one at a time. BORING.

Despite claims to the contrary, the same thing happens in Europa Barborum mod and the RTR mod.

Now, when I say I want them to stay in line, I'm talking first echelon only. They can maneuver the 2nd and following echelon forces in different ways to try and gain an advantage.

What I'm most disappointed in is that the AI does not coordinate Cavalry flanking attacks with its infantry and artillery/archer support. Yes, they maneuver cavalry to your flanks. But they'll attack before the infantry arrives or after you've already beat the crap out of the infantry.

Much more well coordinated attacks, timed well. IE, the cavalry should be hitting my flank slightly after their line engaged my line.

The AI should also use terrain to select tactics. If attacking at an angle on a slope, IE the their left flank is elevated on a hill while the ground slopes down to where the right flank is on level ground, maybe the AI could reinforce the flank on the high ground (left flank in this case) Try and crush my flank from the high ground while conducting limited engagement with the right. Kind of like Epaminondas (spelling?)

If attacking from the high ground, precede the main army with light cavalry and archers to use the range advantage. Something like that.