An upgrade path for monks and Pilgrims,
For most of the game I didn't have an issue with them and my most hated units where hero adventurers(beating me in tourneys), but ever since I have founded my own kingdom and recruited some lords monks and pilgrims have become a plague.
Any lord that spends some time chasing bandits ends up with loads of these in their army, they typcially end up as most common troops type in their armies as they don't upgrade unlike the mighty farmers and peasant women.
In large battles I always see a few of them clogging up my infantry line while the opposing armies never field any in the first few waves.
Roland at one point had 40 pilgrims and 30 monks in his army and this is why he was getting beating by the singalians as they add little to no combat power and slow down the lord which ensures he can't escape.
I always tended to friendly fire them but with high surgery skill they mostly end up wounded and all I achieve is wasting arrows and time on them.
When capturing prisoners I take them and disband them but still some of them end up getting shared out amongst my lords.
Agathon in SS below has 49 pilgrims/monks and while having an army size of 320ish he is almost as slow as Ikram who has an army of 550 and its because of the hordes of monks and pilgrims
There are 2 robber units, one has an upgrade path and the other dosen't
There is also 2 bandit(might be brigand) units and one has an upgrade path while the other dosen't
Maybe allow mystmountain raiders be upgraded to warriors