I gotta admit that I'm getting a bit bored of normal MP. I think there are a few reasons why.
1) It feels a similar to BO3. And I played a lot of that game.
2) 4 of the maps are old maps that I've played 100's of games on already. And I seem to play Firing Range and Jungle more than any other map.
3) Lack of challenges and no skins to unlock for the Specialists means I just use the same couple of Specialists. Which gets a bit boring.