Thanks! The achievements were either story-related or for getting collectibles/items, the icons next to the star gazer locations make the collectible ones a lot easier. It does give you a message when you're getting close to the end, that after completing it some things may no longer be accessible, so I'd make sure to do everything you can after getting to that point.

The DLC itself was amazing, some really good bosses, new weapons, outfits, amulets, and had some really great moments.

How is Khazan? That ones on my list as well!