Those are small addons which add: the "easy mode" a feature who some might like if they felt that the game was to overwhelming, all current bonus packs a nice addition, the soundtrack which is fairly good, and two new missions/objectives: Migration and Denial, those additions are not enough to justify making a new "special" edition that's why I only give this 2 stars.

Well, an extras pack that includes the soundtrack and designer notes. Interesting if you're really interested in the models behind this game (and they did do a good job on the soundtrack).