Would draft be better if everyone could list all roles in order of priority?

Been thinking about this, why do we only get to select two roles to queue for? Why not have everyone just set a role priority so you can more easily be autofilled into something you might actually like? To be fair I'm sure there would be a lot of Mid/Top/Bot/Sup/Jng people but if all roles are taken into account you can also get Jng/Top/Bot/Sup/Mid people or Top/Sup/Jng/Mid/Bot people or so on and so forth. Maybe it would be too hard to make a matchmaking system around this and that's why we only get two options? I mean at a bare minimum we should be able to select three instead of two roles to queue for, it's kind of annoying that we have to drop one of our preferred roles if we want the possibility of trying something different.