There is a difference between great, fun game and "game changer."
I think we are getting those mixed. I'm waiting for it to come out on PC so I have no problem hyping it up, I want to try it out but I think we are overhyping it simply because the PS4 is being excluded and Xbox fans need any reason to pump their chest.
EDIT: Well, it might actually be a game changer. I'm just skeptical about how great it actually is, myself not being much of a multiplayer kinda guy.