Autofill is a joke.
Play one game in your role. Win or lose, your next game autofill is turned on. For people who are only good at one role (Trust me it is very hard to be good at everything, even two roles is a stretch for some folks) and that basically dooms your next game to be a guaranteed loss in some cases.
I am a jungler. I can kinda top lane. I put my secondary as such. I get autofilled into ADC so often it's a joke. I can't last hit I dunno how to trade and I get harassed out of lane every 20 seconds. Despite having basically 0% win rate in bot lane, with an average KD of like .2, League keeps putting me in that role. It's not gonna make me better at it. It's gonna frustrate me, lock me in low silver, and make me just not want to play the damn game any more. I'm seriously to the point where if I get autofilled to AD I'm just gonna dodge because it'll cost me less LP than playing the game and losing would anyway.
They should see what roles you have the worst winrates in and NOT give you those roles if you get autofilled. Autofill should also only ever activate if your queue is like 6+ minutes because I've had queues that were 20 seconds and I get autofilled. "To keep from high queue times" my ass.
Inb4 "People will int on roles they don't want to abuse the system" K well the bullshit of the few shouldn't hurt the needs of the many. I know so many people who cannot support, or mid, or etc, and when they get filled there they lose basically every game. This would actually make the game more balanced in the long run.
Now that I think of it... the game seemed to become much less fun and balanced after the solo queue changes back in season 5... [zombie-nunu-bummed]