i think the medic should be able to heal 2 or 3 times more HP than normal troops without the medkit perk cause they are medics afterall.
Maybe be perhaps their stims also give some sort of boost to troops? Cause atm all medic are good for is the SMG and dropping medic box
I hope they will add soon a automatic behaviour on the medic.
Right now you can ask to be heal with the dialogue wheel, and theb team mate come to heal you.
A medic should do this automatically on your squad at least.
(Maybe not on friendly squad, it could create a mess: Medic running away from the squad to heal sb, exp farm, diying because loosing cover…)