There is room for a DLC that revamps some of the stuff that's lacking, I think. The campfire scenes where you improve relationships for example are extremely bare bones and mostly bad, full of "telling, not showing". I understand that it was a budget limitation and it's one of the places where the game's AA nature shows, but going back and actually animating and recording these into full fledged scenes would add a lot.
I also think Act 3 could use some restructuring and the companion quests be more naturally integrated into the main story.