From a few games last night, it did seem like Gunners/Shotgunners were particularly numerous. In one round we lost (which was regular Damnation or Damnation Hunting Grounds), our team got split up by specialists, and after one pair of players died, around 8-10 shotgunners, along with all the other elites, rocked up to finish off the other pair.
I don’t remember gunner/shotgunner blobs being that dense before the patch 