Champion Mastery Requirement for Ranked??

I've lost several ranked games in the recent days that were lost because someone on my team had never played a champion or only played him in 1 or 2 games before playing that champ in ranked. Can't we at least require a player to use a champion for 10 games or so in normals before adding to the Elo hell of other players by feeding and reading spell tooltips in teamfights? This may not be relevant for the higher ranks but its a real issue in bronze.
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