I've stated my opinion here a bit ago, but I'll say it again.
As much as I would like to see trans representation there just is no way to do that. Why? Because trans-girls are just girls and trans-boys are just boys, regardless of the sex organs they were born with. Gender identity =/= sex so understanding that means, what I have between my legs does not identify/define me. Adding a third gender option is not the answer. Most of these backwoods replies compiled of "sissy/femboy" this or "futa" that... those are not genders people! I can only read so much of it before I really get upset and I'm not even trans!
As for the sensitive women here upset about the dong option, get a grip Karens. It's just an option on your screen for those of us who enjoy fantasy, straps-ons and pegging our partners. If you don't want a penis then don't add one, or stop choosing bisexual poses. idrc
Making the sex organ fluid while offering both a male and female stereotypical presenting body choice could be a start. But I don't even know if that would be possible. It would give those who identify more masculine a way to express that while still having an option where their bits are concerned. Right now there really isn't much available.
Anyway if there is a take away from this thread for you who actually read it, I hope it helps everyone to understand a little more about our NB and trans brothers and sisters. Trans people need CIS allies in their corner and that begins with listening and being open to conversation.