Helmets aren't strong and most weapons kill in two or one hit.
My point is:
Work on hitpoints and make helmets even more useful and competitive. For example, heavy stahelm will cover your right, left and behind well because it's a thick helmet but shouldn't cover front because there is no protection in front. But heavy PSH helmet will cover your head completely but it will block your vision because of the metal cover in front of your face and the player will take a little bit more damage than stahelm because PSH is thinner than stahelm for sure.
And buff helmets please