That games looks real sweet, I've watched quite a few videos on the shoryuken website and I'm actually surprised by lots of the reviews in the wild...
Ok content is pretty low but the game ain't expansive either, I doubt the competences (at fighting games) of quite a few reviewers. Though fighting games are something else, an extremely demanding genre, I won't ever be even a an average players... most people (like me) that still enjoy playing once in a while with friends are barely scratching the surface, they are some of the most complex games out there: mind games, incredible execution, reflexes, etc.
It is the only genre I enjoy watching competitions.
to put it shortly I'm questioning the bunch of 6 or 7 (out of ten) the game got rewarded with, 8 sounds right from comments I read here and there, it is a good first installation for the franchise.