After reading tons of threads about camping vs rushing, bad lag and very bad spawns. I have summized that the real problem is the DOG/Wolf perk! Ghosts developed and marketed this latest COD heavily on the dog. It is a big part of the campaign and had to be introduced as a perk in multiplayer play.
What Activision never figured on was how using the Dog/wolf perk as part of the revenge spawn would double the spawn problems. Every other COD has had spawn problems. But with the Dog perk its become two fold.
I think if the coders get rid of this perk you will see a better and more enjoyable game experience. Spawn complaints wont be so rampant. Game fluidity will increase. You will have less camping and less Rushers. Players will come back to the game. Online play will increase bringing better matchmaking and less lopsided and player drop out games.