For me it was the opposite. Loved the base game, heavily disliked the DLC. The entire poison and hallucinations felt widely out of place, and it got in the way of exploring. The constant need to use the adaptive triggers was annoying and added nothing. But most importantly, the story about Jin and his father did not grab me at all. The uncle one was much better done, imo.
In the end, I ended up skipping it.
I liked the monkey boss fight and its armour, though.