So it seems like not only has there not been any new content added to the game but it also seems like Blizzard has ignored even making simple PvP balance changes.
I don't understand how they haven't adjusted any of the classes that are under / over performing. At this point it is not a lack of data that is stopping them. And when I look at all of the changes they are doing for WoD I can't help but wonder why some of those aren't being done now or at least at the start of S15 (which didn't even have many changes itself).
I think it's pretty unacceptable and low for Blizzard to just essentially abandon the game for a year+ without even minor changes.