So I played some more MP and it's really a two-edged sword. On one side I played 18 player domination on maps like Resistance and Arkaden, which mildly put sucked hard. You get killed like every 5 seconds, every second time by a predator missile or sth because it's such a mess that everybody has many kills easily and spams killstreaks. There's no dynamic in there, positions usually aren't changing on those maps so it's really just run there, get shot, run there agian for the whole time. Awful experience.
Then came Team Defender with 12 players on Village. Now that was an awesome, almost classic CoD experience. Slower pace because you don't encounter an enemy every milisecond, you think about where you're going and there are actually some rather long distances for once. Same with 12p team defender on Mission.
Kill Confirmed on that wrecked highway map was also fun and felt more tactical somehow than your usual run & gun team deathmatch.