The PS4 has outsold the XBOX 2:1 in the UK, outsold the XBOX in the US and its general sales across the world are higher and yet still, still we are treated like 2nd class citizens behind that over sized doorstop. When the DLC dropped for the XBOX One it went online instantly, no problems, no issues.
The thing is it is very very clear that there is some major bug with the MP maps because the new Extinction installs perfectly and if you go into Private Match on MP you can create a game using the new maps. They just haven't been applied online yet.