That's not the actual issue though.
The main reason why the early zones need an overhaul (at least questing wise) is because they are focused too much on Deathwing or the Cataclysm. Then, at lvl 60 you go fight Arthas or Illidan and after that it's back to Deathwing or Pandaria.
I don't need another revamp like Cata where zones were geographically changed - but the questing needs adjustment. Even if it's just the addition of Cavern of Time shenanigans in order to make some sense of all that time jumping nonsense.