Compared to Dragonborn there's not nearly as many spells, weapons, armour sets or magical effects added and there's not the same level of added locations to explore, but that's fine by me, it's a different type of DLC in that aspect. Seems more focused on the story and the atmosphere that can be attained through Vampire lore, Volkihar Keep is in particular a cool place to be.
Thought I'd post something positive as I'm really pleased with it. I can see myself playing it a whole lot.