New Champs in Ranked

So I was wondering if riot could make it a thing that if you have bought a new champion/there is a new champion just released, that you cannot play that champion in ranked games till you have played them a few times (lets say mastery level 3 for example)... Now im pretty sure more of you feel the same way, after having people repeatedly lose your games just because they have no idea what they are doing on that current champion. What do you all think?
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