Class Mastery?

I was in a lobby recently and thought it'd be really cool if we could earn mastery points on a specific role/class to show you're not just a mastery 7 sion but a support main as well. Like say " Mastery 7 Support: 1.2M mastery points in the support role!" "Wow that guy mains jg he's a master jungler." It would help stop people doubting your knowledge of your champion in that role. For awhile no one liked the sound of a sion sup and thought i'd just feed. Also it would make people better about maining or choosing the role they like to play. brings more purpose to them playing that role. let's be honest being a support or adc main right now is sooooo rough.