Worst call of duty that has ever been made, games are slow and delayed, core systems don't work such as things that has been added since black ops 2, such as the camo unlock system. if you think its taking a long time to get diamond keep an eye on the achievements as you will notice you will unlock a camo during a game, once the game comes to an end it will take the camo back from you and it happens to every single camo. on all versions of call of duty. Maps sometimes don't fully load, interfaces glitch and don't show when they are meant to.
Seriously activision need to let the game developers spend some more time to get it right or reduce the price of the game. you can not be asking for the full price when your not even getting half a game.
this new game engine that is being used is clearly not working or those using it don't know how it works, i enjoyed the world at war and modern warfare alot more than i have ever enjoyed cold war and modern warfare 4, the fun factor has completely gone. therefore this is not a game.