I have really thought this through. As a fan of CC, I have an inclination to have all realistic components included, and medics were a component.
The difficulty is seeing how it can contribute to the game (or Sim) in the context of a 20 minute battle. All a medic could do would be to stabilise the wounded who can be stabilised, leave the dead, and get shot or wounded himself. A severe wound could keep the medic busy for 5, 10, or more minutes.
I have never been in battle myself, so can only postulate what the experience is like, but I would use something like Band of Brothers to try and help me appreciate what is going on, for example then the 101st were holding the line in front of bastogne getting shelled by the Germans. The medic pounds around going from casualty to casualty stabilising or confirming dead. Take the Carentan action, where wounded are getting picked up and heaved to some shelter, to remain wounded and out of action while the Medic goes off to find other casualties.
I try and visaulise this on the CC battlefield, and I just can't see it giving me any added value, and possibly distractions that may detract from the experience.
Now, having said that, if we were to zoom further in to the CC model, perhaps we can see some prospect of Medics, which by the way I believe are totally feasible at the strategic level. But back to the tactical.
For example, a Team which has wounded in could have an extra item in the command menu of Medic. When selected, a call will be made for a medic, and if there is one in earshot and not otherwise engaged, he may be able to manouvre to the wouonded and give treatment. Whether the player can have independant control over a Medic would be another issue to deal with.
We appreciate that 9 times out of 10, the Medic is not going to put a wounded soldier back into action. If the wound is light enough, then the soldier (or one of his team) will be quite capable of dressing or treating on the spot, so a Medic would not be needed to put him back into action. However, if a wound is serious enough that self help (or a team mate) is not enough, then I doubt a Medic would be able to put that soldier back into action in that battle.
However, there could be some perfectly valid consequnces of medical interaction on the result of the battle. For example, if a soldier does not die of his wounds due to the intervention of a medic, then that is one more man back for the next battle. The total number of combatants on the CC battlefield make this possibly useful? To have 2 more soldiers survive a battle would be important to me...
Unfortunately, for such a relatively small feature, there would be quite a lot of work on the code needed, so if Medics do appear on the battlefield, they are probably not going to happen until some major work is done on the CC model.
Maybe it can be made to work, and complement the CC experience, but I still need quite a bit of persuading...