*le shrug* I mean, I'd rather play as Korra with a dick than Tenzin. The beard and old baldy guy thing don't really do it for me. I think most people really wouldn't care. If it would be a problem, then I suppose the only logical option for the love route is to just let MC go as himself, and pretend to be a regular guy who just "has" airbending and needs to be trained. Happens in Harmonic Convergence, so they might have to change the timeline some, but they could do it from book 1 if they wanted, its whatever.
Actually come to think of it how the fuck is being a futa even gay if its your character in first person? You're not having sex with a girl who has a dick, you ARE the girl with the dick.
Whats the hold up?