Matchmaking

In the new matchmaking we are able to select our top two role choices. Not having a preferred role myself I like to just fill in. Although this can become quite tedious since the role that needs filling the majority of the time is Support. So my question is, is it possible for Riot to also add an option for one or two roles you don't want to play when selecting "fill"? In other words, if my first choice is fill then for my second choice i would choose an 'I don't want to play this role' option.