Medics, at the moment, suck. I hate them. They wave their arms in the air and suddenly your broken legs are fine. Just like magic! OFP is supposed to be relaistic; why can't we have real wounds? Could somebody make an addon to make hits hurt?
My idea is this: Make a few animations that are executed when a unit takes a hit. If they're hit in the hand thatey fall down clutching it screaming "ahhhhhhhhhhhhhhhhhhh, f***!! My HAND! It's gone!". They will they lie one the floor rolling around in agony. Then when the medic either sees this or is called, he runs over to the wounded guy gives him some morphine, maybe some stiches, bandages it up and pulls him out of the way to safety.
A lot of animations, textures and models would be required, but I think it would be great. You could even have people bleeding to death if the medic doesn't get there in time, or they don't get to a field hospital in time.