Well, call of duty aren't trying to make the game better. They know how many people are addictive to zombies so if they keep releasing the maps then the people will pay the money. Personally I hate the whole zombies, I think it is pathetic how you are playing for nothing. The leader tables will never be legit and that is such a shame. I have friends who play ten hours straight of the same zombie map. There should be a whole map pack based on zombies, this way the game will be more interesting instead of playing the same map again, again and again.