Stick a 70muni LMG on a rifle squad and suddenly they can go up against LMG obers and win just because of suppression with instant pop defensive stance. Buy two on one squad and suddenly they mow down everything that moves.
My suggestions
1. Add a small muni cost for def stance like RET's suppression fire
2. Add in a 5 second setup time where the squad is immobile and cannot fire
3. Take away some accuracy like relic did with the ober MG34 nerf
