There should be an icon that indicates to us if a person has been autofilled during champ select
There should be an icon next to a person's name or whatever when someone has been autofilled into a role, it helps when coordinating picks.
I know sometimes people get autofilled they tell everyone they want to switch. But most of the time especially in ranked people just don't say anything and you don't realize they have been autofilled and if you had known prior to the game starting and you can ask them if they are comfortable with that role and if not you can switch so team doesn't have dead weight.