This is like the one game where they probably could've cut even more content, sold it as DLC, and people would've been fine with it.
Areas and dungeons weren't cut, just an ending or two and npc quest lines and dialogue.
The strange thing in the case of NPCs is that it's mostly the early area NPCs that seem to have no proper followups. After literally everyone in the roundtable leave and die in their questlines, with only your smith and spirit ash upgrade remaining there for gameplay reason (and it's implied they'll just let themselves die there in the future), Nepheli still sits in the roundtable whining about her dad.
There's a faction in the game I suspect also had cut content about them, because I find it strange how literally no NPC ever talk of them despite their importance in the plot, their omnipresence in the world and their one storyline boss fight. The shitskins! There's many of them, and they're not just random enemies, they are apostles of the Gloam Eyed Queen, whose aim was to slay gods. As far as I know, no NPC ever mention their existence, they're just not talked about. Item description of Black Flame type spells says the Black Flame used to be able to slay gods before the rune of death was sealed. Maliketh also fought and won against the Gloam Eyed Queen.
Two of the shitskins can be found around or in Divine Towers too. But as far as the game world is concerned, it's like the faction is just decoration.