The Content Cycle needs to break.

[Azurarok]

They dont have to make any new dungeons, only a new mode where all the walls are gone. Yes, that means if your truely insane, start to finish pulls... yea, think about that madness.

The area between the first and second boss of Doma Castle allows for this and it's probably the most fun dungeon pull in the game. The level it's synced to also helps

Unless you also mean the walls between bosses too. That'd be wild