AFK Tag-in/out System
Its far from uncommon to have a game become a landslide because one or two players on a team DC or AFK, and sometimes things come up and someone has to leave mid-game.
Idea: Have a separate queue where players can tag in for AFKs and pick up where the AFK player left off.
This would be especially helpful for keeping ARAM games a little more balanced. Maybe there could be a side menu for this when the player is waiting for a queue to fill up (they could jump into an in-progress game instead of starting a new one).
Its an idea. I don't know all of the logistics for it.