Primary vs secondary role via dynamic queue (Idea inside)

We all know that putting support as your secondary role basically means you are going to support. Personally, I love the bot lane and I queue up as ADC > Support pretty much all the time. I hardly ever get to play my beloved Corki with the dynamic queue

Here is my idea: Add an option to look for your primary role for a specified length of time and let the player decide. If you don't mind which one you get, you can chose 0 seconds. If you only want to only get your role, while having a longer queue, you can chose 600-1000 seconds. Personally I'd probably pick 60 seconds.

What do you guys think?