Lock champions from Ranked you've never played before hand.
I just played with a Jhin, who has never played Jhin before EVER, in ranked. He had no concept on what to do with the champ besides Qing. He even cancelled his own ult cause' he didn't even know how it worked.
There should be a feature that locks champions from you being able to play them in ranked if it is your first time playing them, maybe even until you've played them with a certain amount of hour time. Like you have to accumulate so-and-so hours on a champion to be able to further play them in ranked.
I really hate hearing my jungle go "first time Shaco!" and not actually be trolling. It penalizes a whole team with losing ranked points because ONE player is completely ignorant of their champion choice.
[sg-ahri-1]