It's not cut content if they never got around to adding it. I think that's what happened -- stuff that they planned for just didn't get made.
Maybe they made a few assets here and there, like enriched infernal iron but, in the end, that never really got anywhere.
So they're likely telling the truth. However, that doesn't change the fact that two fetch quests and a boss fight are a far cry from anything that they would consider a fleshed-out questline.
Yeah, this sounds like a possibility. They "don't lie", but it is very very very close to lie. "Removed or not added" content were Avernus and Upper city, two most important locations for Karlachs story (Avernus for sure, and Upper city if we accept the theory, that her quest should end there). Imagine both locations made it into the final game, maybe this thread will no exist at all. I'm sure, if these locations are in the game, Damon and Gondians have new dialogs about fixing the heart using enriched infernal ore, which is now useless. Also Mizora could have some solution with Avernus.
But what I don't buy at all, it that the released act 3 was completed and they wanted it that way. This is a lie for sure.
