Immortal
Arcane
Feargus says there was a period, during PoE's development "about six months in" when "things were not going well, areas looked like crap, the engine was running super poorly". Relearning how to do an IE-style game was harder than they anticipated. It sounds like it was kind of dramatic.
Feargus says "he had to learn what an SJW is" during the Firedorn crisis, haha
He doesn't seem to regret the purple backer NPCs, though. Only the gravestones.
Source?