Not another "Get rid of autofill" thread but....
Why not make the thought behind autofill not be quantity>quality?
Currently autofill feels like "wait in queue for a really long time and get thrown into any role just to get you in a game since queue times are unhealthy and we don't want you waiting forever" This pretty much means you get a long queue because of the roles you picked but you won't actually get the role you picked.
If autofill meant i play a role i don't want BUT my queue is shorter than what i would've waited if i got my actual role then the trade off wouldn't be as bad for the person being autofilled. But right now autofill is a complete slap in the face for the person being autofilled