Hello,
I think a more advanced medical system would make this game more realistic and would probably encourage more teamwork and medic play.
With "advanced medical system", i mean a system where deoending on where you shot, or generally get injured, you have to heal differently using different items. For example, tourniquet for broken bones, and bandages for bullet wounds.
Also, if you get shot in an artery, you start bleeding rather than just get a big amount of damage once.
An average soldier would carry more simple things such as bandages and tourniquets, and a medic would carry more specialized items such as antibiotics and pills.
This could also be a server-side option, so the admins could choose if they want their server to be more realistic or more casual