No. You have already seen the game at it's best. If you have a buddy I recommend trying Coop - it is a coop game at heart and it doesn't resonate when played singleplayer.

10 hours coop of D:OS1 was the best coop experience I ever had. Playing through both games singleplayer was a dull chore. If you are looking for a deep, story and character rich singleplayer RPG like Baldur's Gates, Fallouts or Pillars - that ain't it.