Increasing the Champion mastery limit
I propose that the champion mastery doesnt end with Lvl 7 as it is easily achievable and most people can get it in a few weeks and it doesnt truly portray your skill with the champion .. I would like it to be increased to mastery 10 at least because true mains and dedicated players will want to truly master the champion over a longer time and probably main him.
Alternative: I main Lissandra (obviously..) and it would be amazing if you would get a certain mastery or border after reaching 100 games with the champion within a season, so it would be special and exclusive to a champion that has been played over a few hundred games..
So i propose either increasing the mastery level overall or granting a special border or mastery Emote after reaching e.g 100 games with a champion, thus making the mastery only usable with the champion.
Feel free to share your thoughts and proposals:)