Mastery point/level system is honestly disappointing

Mastery points don't demonstrate player skill with the champion at all; the points themselves only indicate experience with the champion. Even mastery level really doesn't mean anything. Is someone level 7? Cool, they may have only played 10 games for the tokens and are good with the champion, or they might've played 100 games to get the tokens and suck with the champion.

I do think, to some extent, you should be able to grind out mastery levels. It definitely should not be as easy as it is now to reach max mastery. Maybe mastery levels 8 - 10 could be gated by some metric like consistent performance with a champion, such as a progress bar that increases when you do well and decreases when you perform poorly. There are many ways to make it so that mastery on a champion isn't just some measure of "have you played X games on Y?" and I really hope Riot doesn't follow the pattern they have done for mastery levels 6 and 7.