I didn't find the DLC as engaging as the base game. I wish i played the DLC BEFORE finishing the base game, then i think i would have found it more worthwhile. But unfortunately, there's no going back.
[EDIT: There was a going back and it was really fun and worthwhile. Went from 3 stars to 4. Not that scary if you run into the owlk while singing superbase a couple times before actually committing to a run]