Free Supports and Autofill
Since free champions aren't available to pick in Ranked, this doesn't entirely apply there.
In order to lower queue times since, apparently, the number of players isn't up-to-par with the number necessary to keep queue times low Riot has decided to make a large number of supports free to play for quite a while, and they introduced the Autofill function to force players into Support (most of the time).
Though this may have lowered queue times, I'd like to think players would agree that 2 minutes more to wait is better than 20-40 minutes of forced supporting-- either you or an ally, often losing the lane and then the game because both the role and champions available are unfamiliar.
I don't want to forfeit a functioning team in exchange for lower queue times. Do you?