The Prestige

On previous versions I never saw the benefit of prestige classes. I understand the additional custom class slots are a big deal but the basic ones are enough for me. Pure has no perks or attachments so two or three variations of the AK74u, RPG, and nades are good.

There's something hilariously uncool about camping steps with an RPG. It's even more funny camping corners for a backstab. It's too bad there's really no benefit for accumulating weapons kills, etc. I think most players would be happy with something other than XP.