Changes to fill/support?
We all know that if you fill or support in dynamic que that you are "guaranteed" your roles the next game. I top is my primary role and support is my secondary. This means that I get support 90% of the time. I propose that a player who supports or fills should be guaranteed their primary role. Even if support is their secondary.
If they player does not care what role s/he plays, then an option to override guaranteed roles could probably be implemented.