I would gladly take my secondary position more if it meant removing autofill
So I was looking over the ask riot post https://nexus.leagueoflegends.com/en-us/2018/03/dev-making-matchmaking-better/ and it pretty much confirmed that queue times, contrarily to popular belief, would not skyrocket without autofill. In fact, there wasn't even an annotation on the queue time graph for when autofill was added because it never significant impacted queue times. The only thing that autofill helped with was getting primary position more.
Autofill is essentially putting people in potentially their worse role more just so they get their second best role less.