There are really hard dungeons in GW2. CoF 2nd path. Magg is doing that Kaboomium and there are spawning too many too strong NPCs. I just want to say that if you won’t change difficulty it will become boring and people will be like: Oh my god, I have to do this dungeon just for that and that gear. Dungeons should be balanced too because if one dungeon is easy everyone will do it for quick gear and another which is hard will be empty.