The gender will still be binary, according to what SimGuruDuck said in the stream. The reason I think it's not intuitive is because, as of what the WIP looked as right now, we first choose a sim's pronoun and then we'll be able to choose the sim's gender. I know it's a work in progress and that it might change, and that's exactly why I'm writing this, because I don't think the current state of the WIP is intuitive and I want to show how it could be more intuitive and why that would be more intuitive. I think the pronoun settings that we were shown in the stream yesterday are non-intuitive. When I say 'alien' I mean only the alien life form. When I say 'sim' I mean any sim, including occults BUT EXCLUDING ALIENS.
Also, when I say 'gender' I mean gender identity and gendered language, and when I say 'sex' i mean the body (things like full or flat chest, ability to become pregnant or get others pregnant etc).
Note: When I write 'pronoun' in this post I specifically mean third person singular, unless I specify something else in a specific case. Information, Guides and Announcements for the EA app.