Disclaimer: this is a pretty vague idea and it's not fully on point
I have no problem with autofill, however when I get autofilled top the game is pretty much over. I do have some champs fit for top lane, but it's just the role I'm genuinely bad at.
I was thinking there should be an option to select your least favorite / worst role, so you're not likely to get autofilled that role super often. Ofcourse you can't fully dodge getting autofilled, but I think it would prevent some inting from happening.
I have autofill adc's all the time as a support main and it's uncarriable sometimes. When I get filled top, it's uncarriable for my team. You get the gist of it.