This seems doable, and worth doing, it is just sheading some code errors, not altering the person.
I do not see a cure for autism, for it is human, and in the limited European gene pool, everywhere.
It is a recessive that comes out strong with some crosses, but I doubt we could predict that. I see it as not a "thing", that can be tracked down, but one of DNA X DNA possible outcomes.
The idea that it is a modern epidemic is doubtful, it is more likely that the genes had a higher survival factor, and other genes had a lower survival factor.
Nature plays some harsh games, we are trapped in Evoution in action.
We are five million years old, most species through time have lasted about five million years. Do they destroy the food supply? Run the genes too thin? All become suceptable to some bug? Do they just sit and rock? Stay tuned, we are the first species who can watch it happen, and write books about it, but there is nothing we can do to change it.
Curing disease leads to doubling population, and doubling again, till they starve, become weak, some other bug feeds on them, and we work to cure that, so we can have a world population of sixty billion.
A few hundred years ago the planet ran on human and animal labor. I see autistic thinking in the machine age, which has not freed people, but produced more, and some ugly wars. The same for Science, the eradication of diseases which killed millions, has lead to a population increase of billions.
We did it by mining the top soil, which took long to form, and the oceans, which took longer, both are now wornout. We are just another biological population that has exceeded it's habitat limits.
The first thing they do is look at who can be eradicated, let's cure autism, they can't fight back.
It is like the passengers on a plane thinking of killing the pilot, for all their quirks, it is the autistic who will keep this place running.