'All But' function for role select

I know that Riot tried to do a 'NOT' function in role select awhile back, and they determined that it made queue times too long. This I agree with. That is a lot more computations that the server has to make. Would it be possible instead to just do an 'All But' function? In this you would get to pick one role that you would rather not play that game. I play a couple games a night, and just want to play, so I fill. It gets me into games a whole lot faster than picking any other role, and it forces me to play all the positions. However, probably 8 times out of 10 I get support. I like support and have several different champs that I am good at, but the last couple of weeks I have kind of run down on the role. I know that I can just pick a role and probably get it because of my buffer of 'autofill protected', but sometimes I will pick a role and fill the other side and still get support. This is basically a fill alternative, so the role computation doesn't get much more complicated. Granted you could in theory get a whole bunch of people who try avoid support (or whatever other lane) but the current system already has it built in to override peoples request if the queue is too stacked one way or another. Maybe, unlike fill, it could use up the 'autofill protected' buffer. Would anybody else make use of this feature, or am I the only one who regularly doesn't pick a role?