Ghosts' story is reasonable, albeit cliche. It's a pretty solid campaign on the whole, but the series has done most of the stuff it did before, and its inventive bits weren't so much gameplay tools as just special moments in the game. It had some stand-out levels, like that one full scuba level. Black Ops 1 and 2 are just plain stupid. Worst campaigns in the series, by just about every metric.
The dumbest thing Ghosts did was that, on the PC, in space, it gave you different controls than it did for scuba stuff, even though the scuba controls worked too. They needed consistency on that front. No reason for mouse scrolling/q or whatever when space = up, c = down.