If you’re planning on playing the DLC, be sure to stop right after killing the wet nurse. Like Tim says, you might’ve missed some optional areas somewhere in the mix because there are a lot of them! I completely missed at least a few on my first playthrough but caught them this time around.
The DLC has been really interesting so far so I’d definitely recommend it. I’ve taken out one boss and it was a fun fight, even though it took me a few tries. I didn’t feel cheated for the most part, except maybe a couple one-shot kills that I may have slightly objected to! Seeing familiar areas adds a lot to the experience I think.