Wanna buy the same game 5 times? If you've bought the Call Of Duty games since four, you already have.
That being said;
This game is the same as all of its counterparts since four. Minor tweaks do NOT deserve to be resold to a consumer and should be released as a patch or a mod.
Not only that, this game is still pushing the card of 'Get more kills, overpower yourself more over the players that don't have as many kills'. It's like saying that a body builder and a four year old kid are going to have a fist fight to the death while the body builder is supplied steroids. It leaves a stupidly unbalanced game experience that really doesn't rival anything.
But all that being said, do I really have to say anything else other than it's just a map pack with nothing changed? No, I don't.
Don't buy this game.