Ranked is basically there for people to tryhard in, why are people allowed then to play champions that they have literally never played before. Essentially, in a mode where to goal is to play optimally, playing a champion that you have never played before is by definition, sub-optimal. A simple fix would be to lock all champions that you arent at least mastery 3 on. With a flat time for new and reworked champs. This way, you can not only learn the champ, but people can learn how to play against it if its super broken.