What I thought would be cool is DoL/DoH combined arms dungeons. Like for example instead of taking charge as a combat class through a dungeon you have to gather raw materials (in the dungeon), then the crafters in the party would turn them into items (dungeon-only recipes so they can't be prepared beforehand) for NPCs to equip to push through a dungeon, and rewards would be based on the quality of the materials gathered/made affecting the NPCs' effectiveness. I would LOVE something like that to be implemented in the future.