Give us the ability to Toggle Autofill on/off
That way those of us who don't care about queue times don't have to get autofilled in a role we're trying to avoid playing.
Me for ex, I hate ADC. Relying on your team to do everything while you sit in the far back right clicking and hoping the enemy assassin is vision impaired. I hate that playstyle. I normally play Tanks/Bruisers and when I get stuck into a role that makes me play the opposite of my preferred playstyle i'm probably going to feed.
If you want us to have better experiences in this game then give us more control over it rather than letting RNG control it