Originally Posted by Dasale 
The best is for me The Stone Prisoner by providing a totally new companion for the main game. But well it seems have been included in any game and just a way to force players suscribe an EA account and enter in the DLC system with the goal to make used game less interesting.
They bluntly admitted Shale was supposed to be in the main game. That's why it's the best "DLC" of the lot.