I wouldn't build it as a flaw. I'd play it as a way of roleplaying certain ability scores. In your other thread, you said you're on the spectrum yourself, so I'd read over the mental ability scores and decide how to represent what you see as aspects of being on the spectrum means to you.
I have friends on the spectrum, but I'm not myself, so I wouldn't want to make insensitive assumptions.
What do you see as the differences between an autistic person and a neurotypical person?