In light of the sexism debate and the reactions that were evoked by the localization announcement of Senran Kagura: Burst on the 3DS, it is necessary to talk about this topic in the context of this review. Every single one of the characters in Senran Kagura: Shinovi Versus has a personality that goes beyond simple clichés (even though they aren't exactly avoided, either - you'll find all the usual anime tropes). The main story is about friendship, being accepted for what you are, growing up and the problems that come with it. Each of the girls undergoes a development, learns to be self confident or face her weaknesses. And yes, almost all of them have big breasts.
It is okay to be bothered by Senran Kagura being "sexy" and that it features unnaturally huge, virtual breasts that defy the laws of physics so much that even Itagaki himself would get a strong nosebleed. If someone is put off by this type of content, he has every right to say "No, I don't want to play this!", because, while Senran Kagura: Shinovi Versus is a good and fun game, it is not on such a level of quality that one would miss out by not playing it.
But before you judge prematurely, consider that it might be the strongest kind of irony calling Senran Kagura sexist when you ignore that there are almost two dozen female characters, strong in personality, and instead focus only on their huge bustlines.