Ghosts is a garbage.
Campaign is very unrealistic.
About multiplayer:
I played it for 4 days, hacked, now prestige 10.
1. Already met hackers with all perks, godmode, wallhack.
2. 5/10 people use Honey Badger gun that is overpowered, IMHO. (Supressed, kills with 3 bullets in arm).
3. Spawn system is a piece of crap - you respawn, run forward 10 meters, enemy spawns on the place you spawned.
No need to get it. Better play BF4

Sorry for my bad English.