Ranked, Champ Mastery, and New Champs

I propose a solution to the issue of people testing champions in ranked games that doesn't require Riot to disable them in ranked queues:

Week 1: Champion can be played with level 3 mastery Week 2: Level 2 mastery Week 3: All's fair!

That's it, just a token amount of games so that a player should at least know the basics of a champion before using them in a ranked game.