This isn't saying remove the quest, or new zones, this is saying remove the level next to your name, with the thing that provides it,experience points, make quest matter by rewarding player power (Example:Artifact Power) that will always matter through out expansions along with skills/abilities and gear, even reputations to reward you for adventures/quest. This would feel more like character progression because after each expansion you will always end with more power then what you started with by completing the questing experience
...Not just speaking about WoW, but in generally every MMO.
Its a needless climb of "the real game starts at level cap" and hinters the progression of the player until they finally reach that cap making everything before so essentially pointless because lets face it...no mmo's starting experience is a giant tutorial, often just bland unoriginal kill/gather/group quest while some zones might tell an interesting story, or you might find a interesting chain quest...but guess what, you'll out level it before you finish the zone or that chain! Because wouldn't you know it...every mmo seems to come with experience boosting gear nowadays which makes questing even more so unnecessarily fast, even when before hand it..was unnecessarily fast.
But you'll say"But its is necessary to get to the real game faster" but then you have games offering max level boost you can buy, or a previous expansion level boost even rewarding max characters with a purchase of a new expansion. Many games even strip leveling after a time to go for an item level sort of approach. So why not replace it altogether?
And further more, its just going to get ridiculous. Hell look at WoW, we are already 110 what's next 125, 140??
Its to late for WoW's early game to take this approach but next expansion, not gracing us with a veil 10 more levels to grind out? Possible. They already have the scaling technology in place.
So the question is, how do we make the questing experience rewarding and impactful to the end game experience as well making it a essential stepping stone in player progression without rewarding experience,levels for gratification?
P.S. Not saying remove the questing experience, just remove...experience points to get to level 2 and so on and so fourth. Reward player power, and abilities, and gear by questing instead of the traditional experience and new number to point to your shirt for the next 30 minutes until the new shiny number gets pinned