Well, Blizzard talking about level squish, also Ion talked about classes to be reworked back to actual classes and not just specs - that means quite a huge chunk of a game would be reworked.
From many speculations and talks - it also looks like another global change to the world could happen - a la Cataclysm.
So it could be that next expansion would bring huge changes to leveling/questing experience as a whole.
But this expansion will be like that till the end. So - join a WPvP community and call for help and gank that ganker? --------> Horde and Alliance WPvP Guilds and Communities