With Hussie sort of talking about how the classes may not be as restricted by gender as they seem, would you say a gender-neutral individual would have access to every class, or just ones that aren't restricted? Do you think it's possible that more unrevealed classes exist exclusive to them or do you think that we know all the classes or that we don't and there aren't any exclusive to them?

There are no Gender Restricted Classes, so regardless of their Gender, anyone could be any Class. I personally don’t think there’s more Classes than what we see in Canon though, but it isn’t hard to come up with more, Fanon-wise.