wtf? Why should every game have co-op?
Do you want another dudebro shooter?
The MP is fantastic and doesn't feel tacked on, imo.
Well, it's definitely not tacked on since, you know, a massive portion of their team worked dedicated to the multiplayer alone. You don't put aside millions to a particular mode as a meagre "tack on". People need to realise that just because a multiplayer mode is not to your taste, does not mean it is "tacked on".