Dynamic Queue for Supports

I know there have been tons of issues with assigning the support role in dynamic queue already... but as a support main (of sorts), I've recently noticed a really, really annoying issue with the queue for supports.

For reference, I'm an ADC main now but I used to main support. Those are my two strongest roles, so when I queue for ranked I pref ADC first, Support second. And, lo and behold, I always get support. I have never gotten any other role when I put support as my second pref. I realize that it's hard to find supports - which really sucks - but this system is absolutely broken for people who _can _ play support, like me, but would rather play another role (so that we're not absolutely helpless if the rest of the team feeds ahem). If someone is preffing another role first, then it's completely unfair that they will never get to play another role just because they're actually willing to play support. Not only is this system unfair, it also discourages people from actually preffing support, which only makes the support shortage worse.

I think this should be a super easy thing to fix: just track how many times a player has played support instead of their first choice role and guarantee first choice after a certain number of games. This is similar to what they already do for people who fill support. Does anyone else have thoughts on this?