Squad revive: let squad members who aren't medics revive each other, obviously with non-medics having a longer revive activation (5 seconds?). This feature will promote squads to stick together and hopefully enable more teamwork. Look at Contractors Battle Royale mode for an example of how to implement this mechanic, the player must grab the stim injector from the downed teammate and hold trigger until the teammate revives. You can balance this so teammates who are revived in this manner start with 50% (or some other percentage) hp.