sadly I'm addicted so I'll likely play the game in some form, I would just play a lot less because again why play something you dislike right (I'd focus more on achieves or collections instead of actual content)
tbh, if SL sucks, or if the perception is as bad as Cata/Wod/Bfa... it would crush the playerbase from the normal 5+ Milli to probably 1 making it a life support game like Diablow or whatever else you think in the blizz line up is life support (Hearthstone and OW are not on life support, they make a lot of money)
So again if blizz doesn't make this xpac good like Legion, Mop, or Wrath, they are looking to pretty much KILL the game