Champion mastery pushing roles?

Hi!

I'll start this thread by saying I love the concept of champion masteries, however, I feel like it is pushing roles on champions. For exemple, I like playing galio mid as a mage, so I thought it would be cool to have "Warlock Galio" for champion mastery instead of "Brute Galio", but it seems that I can't.

Champion masteries pushes me through the tank route, even though I was mid early games, and bought athenes, luden's echo and zhonia as items. It would seem that from the game's perspective, this is still called tank, probably because of the champ and not the playstyle.

Could it be possible to allow every champ to level his champion mastery though any of the six roles?