It's like eating a Lightly-salted flavor Pringles straight after the original one.
Of the new creatures, the MegaDragon is something to behold and rather fun to use albeit a little taxing on your already tight resources. The Catapult and Frenzied Gnasher are just fillers I felt. Why is there only three? If there's one for each faction, and the campaign is built around the new creatures, then this expansion may be something to root for. Ultimately, I play it just because I feel the need to as a fan of the series, and it's still fun enough, but The Gathering Storm is better.