Are new releases in ranked a problem?

I've seen several people suggest that Riot should disable the champs in ranked for 2 weeks. This wouldn't fix things and it would be unfair to people who put in the work to properly learn the champion and want to use it in ranked.

But I agree that it's not fair to a player's teammates to pick something they are highly likely to perform horribly with.

So I'd like to propose a compromise:

Require a certain number of non-ranked games with the characters before a player can use them in ranked. Additionally, require that those matches be won, or that a certain mastery score gets earned in each of those games.

For example, 3 normal games where the player earned an A or better with that champion.