Expanded Champion Mastery ranks

As we all know, there are currently five levels of mastery. Each of these mastery tiers can be attained regardless of skill, it just happens to take longer if you don't win games and/or perform poorly. Here are the current tiers:

Tier 1 - Play the champion once Tier 2 - 1,800 Points Tier 3 - 6,000 Points Tier 4 - 12,600 Points Tier 5 - 21,600 Points

What if, as an expansion to this system, new higher tiers were released that have dramatically reduced rewards below a certain rank? For example:

Tier 6 - 50,000 Points Tier 7 - 75,000 Points, all point rewards below rank C are reduced by 75% Tier 8 - 100,000 Points, all point rewards below rank B are reduced by 75% Tier 9 - 125,000 Points, all point rewards below rank A are reduced by 75% Tier 10 - 150,000 Points, all point rewards below rank S are reduced by 75%

In this system, it would be feasible to get Tier 4 on lots of champions, Tier 5 on a group of favorites, then one or two champions with insane dedication could ascend the higher ranks from 7-10. Getting Tier 10 would be almost impossible unless a player hardcore mained a champion for months and got really good with him/her, but even Tier 8 is achievable for most people.

What do you guys/gals think of a system like this for Champion Mastery?