I used to be a domination fiend back in COD4, but I've only tried it a few times on Ghosts and gotten my ass thoroughly kicked every time. It seems like every flag has about 129 possible sniper points, sightlines and alleyways that can be camped. I'll give it some more time because I'm really really getting sick of the goddamn ridiculous spawning bullshit in KC/TDM (where's the T in TDM when people get sprinkled all over the map?), but so far it just hasn't worked. Maybe I'll make a dom class with smokes and trophy systems and whatnot.
Admittedly this is just my experience in Clan Wars (or Clan Battles? Whatever it's called). 4v4 is a lot more manageable in that respect. Dom isn't perfect, by any means, but we're consistently winning with some semblance of a strategy. We still can't predict spawns and a lot of kills are still BS, but as long as you're playing with teammates, you should be fine. Playing with randoms though? Good luck lol.