You are now a Unit Designer for Medieval 3. What changes and additions would you make?

As title.

Personally, I'd make it so that longbowmen units would sit into the genaral Unit Pool (though of course England would still have extra strong ones), and differentiate them and crossbowmen via firing rate vs accuracy. Bow archers would be able to shoot much faster than crossbowmen, being more effective against common troops, but crossbowmen in turn would have a higher accuracy, and maybe a degree of higher "crit chance" akin to Lethality from Pharaoh, if a system like that would be implemented, to represent that for the same degree of training, it's easier to aim a crossbow at weakpoints in armor.

When it comes to infantry meanwhile, I'd personally like to balance the units into 3 broad categories: Lineholders, which is where your spear+shield and later halberdiers/billmen would slot in. Decent allrounders, can hold a line pretty well. Then there'd be the Shock Troops, heavily armored elite units armed with 1-hand weapon+shield, two-handed axes, greatswords, and so on. Your foot knights specializing in breaking other infantry lines but generally weak against cav, especially the 1-hand weapon+shield which sacrifices defence against cav for defence against ranged. And finally, the pikemen, which are optimized for defene against frontal charges but is weak against ranged, and starts out fairly elite, but becomes more common as the game progresses, at least in the "Western Europe" pool

And related to that, to simplify things unit pools would be grouped into general regional unit pools where possible, with factions within those adding unique units and modifiers (IE England in the "Western Europe" pool having access to improved archers and maybe foot knights). Example groups being: Western Europe, Steppe, Africa, Middle East, Eastern Europe, and maybe India?

But what would you do?