While the idea is interesting (I'm on the spectrum myself), I have to say one thing: how to better represent the spectrum? No two autistic people are the same, each have different stims, different disturbance makers, different special interests (though The Sims does tend to be one of the popular ones...) etc.
It's difficult to get right. And according to one article, Socially Awkward trait from High School Years is one of the ways they have represented neurodiversity in The Sims 4 (yes, it exists in The Sims 3, but it also boost Science skill gain though...).