Just a quick update to break the silence again :-)
Everything is going well, there will be 4 dungeons, with 15 new bosses. The raiding screen also got an overhaul. Now with more space, and a more cleaner look.
The user interface in general will evolve bit by bit with each patch. You might notice some of them in the feature patch.
Dungeons / Quests will now also reward a type of currency, which you can exchange from the shopkeeper for goodies.
(Shopkeeper at your service)