This Needs to Be Said

[Reynhart]

1) the devs encouraged it

How would you do that ?

Think about it: instead of having to design a complex dungeon with new mobs, new abilities, new art etc, they can just re-use art assets, mob models and abilities in game.

Yeah, instead of designing one straight line with three circle rooms, they have to design a huge zone with caves, slopes, verticality, etc...