I can't play with other dlc user online on the PlayStation 4, i remember downloading the 1st dlc when it launch and it work instantly before they patch it (even though i wasn't lagging), after that i can't even join a ground war with the dlc. I did everything right, but the dlc map show up does during search a lobby join in but it's extremely ultra rare to be in one. I do have all map pack that come out and again did eveything and still no luck joining a lobby with the dlcs, this wiil be whoever making the online part of Call of Duty Ghosts, Activision needs to be restrict and get on their case because this is completely unacceptable.
By the way, their official forum won't let me do this, it's stupid error kept popping. I hope advanced warfare doesn't suffer the same fate as Ghosts.