AI doesnt like to diversify its unit build?

[nameless]

I destroyed an army that was full of Pavise Crossbowmen. Afterwards, the next full stack army was a mix of spearmen and mercs. So the AI does try to diversify a bit.

Though I would like to mod out the seige weapons when I can, the AI seems to like spamming them all the time. Did the same with RTW. Plus, I hate seige weapons, leaves less men to kill.