I don't think Asuka will change just because Kaori lost the solo duel. I get the impression that she encourages personal merit and not hierarchial oppression. She challenged Midori because it ate into group practice time. Self-practice is a back-up plan, but not why they were together in the first place.

Kumiko can be bisexual. Reina wouldn't mind that. Bisexuals are probably even rarer than simple lesbians.