I think they should do away with Overkill. I can't see too many gamers being confident just running with a shotty as a primary and not having the likes of an M4 to fall back on. Rather than nerfing the gun heavily, removing this perk would probably have a more noticeable effect. At least when we had Overkill before in the pick 10 for instance, you had to sacrifice a perk slot for the wildcard plus another item such as lethals/non-lethals and even a secondary. Overkill as a flat perk in quite a weak tier is way too generous of an offering. Add that to shrapnel and you get two primary weapons and two lethals which is a ridiculous OP build.