Intersex is in a weird place because the team want to be sure not to fetishize it like most other games do. They'd like to be able to do it respectfully, so it's far on the backburner. If it ever gets worked on at all
Seeds that exclude all of a gender is a no. Bad apples ruined that possibility since you get so many people going "I WANNA BE ABLE TO REMOVE ALL TRANS PEOPLE!". It's a loud minority, but the devs would rather not feed those folks.