Leaving aside the fact that this was a failed utopia, I am troubled by your comment "neurotypicals can get along with autists just fine (when they, you know, actually try), and this makes the difference between genders look hoo-boy-tiiiiny." While it appears to be true, it is also true that even a minor change could easily render cooperation with another mind extremely difficult. Diversity has its cost. Freedom of speech means you can't arrest racists until they actually start killing Jews, for example