They should have doctors, but true medieval ones. So if you get wounded and there is no doctor, you have a 50% chance of survival. But if a doctor treats you, you then have a 10% chance of survival.
True.
I would be cool if there was medical skills that would benefit an army after a battle.
Such as limiting casualties by saving wounded/otherwise dead men.
That would be similar to the surgeon/healer skills/first aid skills in Warband single player. But I just realized I have no idea how armies will work in this game. Will you be followed by mindless bots that their owners will 'possess' right before the battle, or will you open a bag and the rank and file pour out.