A few things to be excited about in this expac - for one, new spiders. If you're like my playgroup, and love using real beasties against players who get squeamish, a new spider option - and ranged at that! - is worth a little song and dance. The other beasties are great for rounding out the ranks, too.
The new heroes are delightful. I think the biggest one for us is finally having a warrior archetype who is more attractive than Syndrael, with a very different playstyle. Having a hero whose heroic ability messes with the OL's hand is pretty sweet, too. I don't think there's anything in this pack we're not excited to whip out on our next run-through. Overall, very nice.