Something interesting would be if you have a machine gunner in a position, letting a field ops crouch/lay next to him (facing him) feeding him the belt of ammo to the machine gun. The field ops would only have to hold the use key next to the machine gunner and would use up his energy bar whenever the machinegunner fires. The advantage this would give would be that the gun would fire faster, more accurately, overheat slower and would have unlimited ammo. All of these things would last until the Field Ops stops “feeding” him the ammo (holding the use key) or runs out of energy.
Of course this would make the machinegunner much more powerful, but it would also take a lot of coordination, and the fact that the field ops would be helping the machine gunner rather then spamming you with airstrikes, I think it could be balanced. Tell me what ya think.

Unfortunately, the lamers would probably just disconnect and reconnect to skip their punishment.