Now, for fun, and since we love speculating, let's compare the patch features of DF vs what TWW might bring:
DF patch cycle ---
TWW patch cycle
Trading Post --- TW revamp/expanded?
Upgrade gear system revamp --- Archeology revamp?
New spec --- New class? (unlikely)
Follower dungeons --- Follower raids?
Plunderstorm --- New PvP event?
WoW Remix --- TBC Remix?
--- New allied race/s?
--- Evergreen Brawler's Guild
DF also added new class/race combos and several Heritage Questlines, new zones, new raids, a megadungeon, new world events... but these are things that we would expect and not new features. I believe that we will get more from TWW, and if Delves work well and the story is better than DF's (which is not hard), I am positive that TWW will be more enjoyable than DF.