It would be nice if the medic classes for both sides could see their teammates' health. Otherwise the injured have to type it out in chat and the medic has to find them to heal them, but by that time they are dead. So far, unless you are using Teamspeak or etc., the medics are practically useless.
Oh sorry, I just realized you can call a medic with H I believe. The feature I mentioned above would still be nice though.