Dungeon Vanquish
Basically let us do all the paths in a single run and receive a bonus chest for that.
Vanquished mode
After you make the vanquish you unlock the vanquiched mode which is the dungeon cleaned and you can acess when you want with your character. It could be a normal map rather than instanced, there you talk to NPCs of the Orders and they would tell you what they found there:
-Jump Puzzles
-New Ranger pets
-New craft materials
-Recipe vendors (only to improve the weapon and armor of the vanquished dungeon)
-Guild Missions (maybe… if someone from the guild is able to bring those who do not vanquish).
-Dungeon Backpack
and more, you guys have a lot of talent and creativity.