After watching my boyfriend go through about 10 starts of an ARAM (because so many people bailed) before finally actually playing one, I thought of a random idea that could potentially prevent less leavers...
What if there was a one-time re-roll, persay, of your randomed character?
Ex. You are randomed with Skarner, who you don't find a good character in ARAM's. Instead of bailing, you use your one "re-roll" for a chance at a better character.
Both a positive and a negative: Could entirely alter a team comp (if everyone uses their re-roll and chooses a different character).
Restriction to consider?: Disallow both a trade and a re-roll per player, (autolock your character if you use your re-roll; disable re-roll if you have traded a character)
Just an idea, please add some constructive feedback with your down/upvotes.