I would have nothing against the AI spawning armies like hell if they weren't just standing around stupidly. I have a few cities where there's about 10 stacks around. And no, it is not really funny to defeat them all.
I already had to lower my unit size setting to normal in order to be able to deal with severel full stack armies in one battle. It does spoil the fun a bit for me.
I do hope there will be another solution for making the AI better than the one recently in the script. This is - as far as I can tell from playing - the greatest mod out yet for MTW2 and it should not be a mere slaughterfeast.
So if there is any way to make things better concerning that point - the rest already seems very perfect and I immensely enjoy playing! - please do it.
+rep for the team.