Modifying the Autofill System

Ok, so we have a Primary role pick and a secondary role pick with the possibility of getting autofilled and then getting autofill protection in the next 2 games. that all fine and good but I feel that there is always that one role you just don't feel like playing that day. I feel we need to add a third box, arranging the 3 as a triangle, with the option for least desired role. Now, I know what you're thinking, "Everyone will just spam support" and no one will ever play support again except for the few people who actually enjoy the role. To counteract this we could make it so that you cannot put the same role more than once or maybe twice in a row before having to put a different role in the box or possibly leaving it empty. As a player, I don't really mind getting autofilled but there are those nights where I just REALLY don't feel like Jungling, or I REALLY don't feel like Supporting, or maybe I've played mid enough times for one night and don't want it again so soon. This would not get rid of autofill, it would merely alter it slightly and provide players with just a little bit more control. If you have any thoughts, please let me know, I welcome constructive feedback.