The "feminine male" is also very visible both in K-Pop (as zeylos pointed out) and J-Pop, since Mana-sama actually used to crossdress (and may in fact be partly to blame for my fascination with "Goth Loli" fashion) and Gackt literally being the inspiration for Crisis Core's Genesis. In fact, look at Gackt in almost any stage of his life and he's either androgynous or femenine.

To be noted: I would be equally ok with a more masculine or femenine (or androgynous) looking m!Viera. About the only way I wouldn't be ok with the design would be if they had an equal or more pronounced dimorphism as the Au Ra.