I've had the game since yesterday and the things that are so annoying are:

Spawns are the worst i have ever seen in a call of duty, i was playing domination on strikezone and i was checking out of a door to see if it was clear and an enemy spawned like 1 inch behind me. This has happened quite a few times.

Grenade don't do any damage even if they are right at their feet, I've maybe had 3 grenade kills out of 700 ish kills.

Silencers seem to make guns more powerful than with out. every 1v1 gun fight against a silencer I loose but against guns without I win most of the gun fights.

Now This is the thing that's really getting to me i can not play a game without being shot in the back constantly i don't know if its the games spawns or just people flanking round our spawn but out of 600 deaths about 300-400 of them are from being killed from behind.

Apart from these issues I am enjoying the game