Fixing the Support Role
Clicking "Fill" gets you the support position the vast majority of games. As long as this is true, something should be done.
What can Riot do to make support so viable and so desired that "Fill" no longer automatically means "support"?
How about you make the lowest gold member of the team automatically tax the rest of the players? It should be balanced so that on average, the support role finishes the game with the least gold no more than 50% of the games. That would mean a pretty large tax, somewhere around 10 gold per minute per player, with a fixed portion and a scaling portion. Why not just start at 2 gold and then work up until the desired outcome is reached?