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.

This game does not need dlc, it will just dilute the awesome. But there must be more Clair Obscur games.