Thing is, does she want to? She explicitly said that she's coming back for GATAS, and that she's doing so because she can manage both her studies and futsal. Does she really want to mess up her schedule by juggling with studies, futsal practice and games, and then some other performances? Will UFA be willing to try it and then cancel because she has to do some stuff for the university? Be glad she's back in GATAS and that you can hear her and see her in ONGAKU GATAS, but let her follow her studies too.