As people have been lambasting the dailies in MoP, I'm hesitant to even suggest this, but hear me out. I'd like to see class quests return in the form of dailies, available across a wide level range, starting low (preferably at level 10 like it was originally). These dailies would involve performing role specific functions in a phased solo-area, like protecting npcs from being killed as tank, or healing a squad of fighters as a healer, etc. Some would also be themed and stylized by class (Rogues tasked with infiltrating an encampment guarded by lethal enemies, while Hunters must carefully pick the enemies off one by one utilizing the various snares, and traps available to them).
In addition, I'd also like to see a reputation of some kind added to this that would allow you to purchase statless weapons and armor overtime for transmogrification purposes (ie; the new character creation gear, for instance). Special mounts, tabards, or other cosmetic items could also be available (the Fel Fire mod version of the Fel and Dreadsteed spring to mind here). The grind to achieve them needn't be terribly long, provided that the dailies are sufficiently challenging and done "right".
The end results would be this:
- Players would (hopefully) learn more about how to play their class or role in a more structured way, and at their leisure, rather than on the fly.
- The sense of identity a character has regarding their class would be brought forward as you are specifically tasked to do things in ways befitting your class and/or role.
- No one can complain. Well, almost. Complaints would probably be even less legitimate than usual, as the gear would provide no benefit, and thus would be entirely optional to grind reputation for.
It's obviously a tall order though. It would be a lot of time and resources spent developing non-max level content, although the system could simply scale with your level (which would make sense).