Finished the campaign, although I think it's better than nu-MW2 and 3, I still think it was pretty mid ngl.
The story is nothing special, you have that (quite strange imo) mission where you find out about Case's origin, and then it barely matters to the story at all, the open missions while miles ahead of MW3's, still felt like filler to me, the villain was super predictable...
Overall I think Cold War was way better than this, and then there's the whole Gulf War and Bush/Clinton/Hussein marketing shenanigans they did which also barely mattered for the story. Idk, I guess I was expecting a bit more emphasis on the Gulf War and less open-world missions, I miss being a grunt and playing in famous battles among big armies.
Oh well, for 12$ I can't complain too much, it was worth the money imo.
But I still think nu-MW's campaign is the best one COD has had in a decade.