Role selecting in draft or ranked queues

Hey guys!

The recents updates make us choose, in draft and ranked queues, our prefered roles so that we get them. But how about league of legends add something? How about they add something to the fill option: Roles that you don't want to play. Personaly I would always put fill except a or 2 certain roles... What do you think about adding that? Should we propose it to Riot and everyone leading league of legends gameplay?