While many of the quests are repetition or delivery service type quests, i don't know at lvl50 i find their is lots to do. But do get what you are saying.
The 2.2 update will see new Primal, new dungeons and HM dungeons and of course new quests.
I have a strong feeling as well that since the 2.2 update is dubbed Maelstrom that the gun class will be implemented. Just my opinion of course