While I'm probably considered high-functioning autistic, I have seen the devastating effects autism can have on people less lucky than me. I don't know if I'd go for an autism cure myself, but if autism can be corrected for in the womb or right after birth, I would definitely be in favour. How necessary such a cure would be, depends on how extreme someone's autism is, and if the cure can be administered before their disability helps form and solidify their personality.

However, I think mental disorders like autism and physical ailments like deafness don't have the same ethical impact. One changes who a person is, the other changes what a person is capable of. It also depends on how bad the disability is; in this case, the kids showing most promise could already hear, though badly, and the treatment let them hear much better. I'm not even deaf but I'd happily take a treatment to fix whatever hearing damage I've collected over the years.

And for what it's worth, eugenics is already with us and that's actually not so evil. People carrying certain genetic diseases choose not to have (biological) kids all the time. Others still choose to risk it. As long as there isn't some large conspiracy about perfecting the human race behind it, eugenics can be helpful.