Can we have 2 "Champion Mastery" scores?
When you main a champion, you begin racking up a ton of mastery points for them. It leaves one feeling a little cheated because there's no incentive or recognition for having any more than the required points to hit mastery level 5.
Introducing more mastery levels and potential rewards aside, we should have side-by-side scores that tell how many champions you've mastered and how much you've mastered your champ pool in general. A sum total of your mastery points would show that quite easily, since your level 5 champions are worth 12 times more points than level 1 champions.
For instance, my current mastery score is 175, but I play the same champions so often that I have little under 1.58 million total mastery points.