What dungeon has enough lore to give it the Black Rock Depths treatment?

[Tupsi]

A dungeon like that wouldn't really operate well on their dungeon timer system. .

That's why I said Lost City was wasted potential - It was a 'gated off area', but ended up as an instance instead of overworld. All they need to do is make more overworld dungeons and simply instance important sections when need be, e.g boss areas.