WOW got kinda stale. I know they keep improving this 15 year old engine all the time, but it has its limitations. Wouldn't a brand new engine with far better visuals be the boost WOW needs? It would also create a big buzz and bring many new players in because there are a lot of people who don't want to play a 13 year old game and it doesn't matter to them that it basically is being reset and improved every expansion.
They could do it like Final Fantasy 11 -> 14 - starting completely fresh. FF 14 was very very successful (second time around, but that's another story)
Your thoughts?