The recoil on Ice Breaker prevents you from getting off multiple rounds in a small location in quick succession. It's not a great PVP rifle. Also sniper head shots and two to the torso are kills in almost every shooter ever made. Snipers are already marginalized due to map design now you want to make them even weaker? Bad idea. The only time I can remember snipers being OP was when you could quick scope head shots on Halo. I respect guys who snipe well on these confined maps.