This kind of thing is really interesting for what it might teach us about autism and the human brain more generally, but when it comes to the practical applications I just don't see a future where it doesn't present a ton of problems. Even when you make it 'voluntary', eugenics is dangerous and closely allied with exterminationist sentiment, thinking, and practice.
And it seriously risks, at a minimum, deeply undermining struggles to accommodate rather than erase disabilities. Admittedly this is a step beyond the technical capability, but if a society develops an expectation that some major human variation (be that autism, deafness, blindness, or whatever) be cured rather than accommodated wherever it is a 'problem', where does that leave people (or parents) who refuse the cure for themselves (or for their children)? I can easily imagine arguments like 'if you don't want problems, just administer the cure! you're being selfish', 'this creates an unnecessary burden', etc.