So i just started levelling with the last class i haven't touched since i started back in 2009. A Rogue.
I was going through all the quests again and i was thinking if we are ever going to get another cataclysm like expansion where they will update all the content and quests once again. I think they have a lot of content just serving as levelling zones with a lot of lore/achievements and other stuff to do. With the new feature in legion coming up, i'd think it'd be best to make all the zones max-level or the level your character is and utilise all the content. Imagine, every zone will be meaningful again and you'll have so many things to do! Plus all the new generation players will get to visit content as if they were back in their prime. Imagine all the raids being accessible again.
It's just a thought, i'm quite sure this mightve been brought up before. But i can't just stop thinking how much potential gameplay this game has and how much more it can offer. Sure it might take a really long time to get all of it working together, but at least blizzard should consider it. Creating an expansion with revamped world might make the game a LOT more interesting. It will appeal to both the community, the old school players as well as the new generation players as it will be still new/undiscovered content for them with a lot of older raids at the max level.
I hope this thought/idea comes across blizzard!