In brief, I'd expect a lot more for thirty bucks. While the Heroes of Might and Magic model is undoubtedly engaging and a very welcome change of pace, more has to be done with the title in order to convince me to buy a second expansion. As it is, the core game and the first expansion offer more than enough gameplay to make this extra expansion somewhat redundant.
Three new creatures, largely unused, plus five new campaigns hardly makes for a compelling second expansion. This is the same amount of stuff we were offered with The Gathering Storm and at least that came with the much-needed multiplayer update. Tragically short of some fundamental or at least far-reaching updates, this title will only be of any real interest to the hardest of hardcore Heroes fans -- but then, those are the kind of players who would buy it anyway without any regard for review scores.