@Riot: Require Minimum Games Played Before Champion May Be Used In Ranked
The Problem
I have been running into a lot of players in ranked who are playing champions they are unfamiliar with. I have checked match histories and found that they often have only played a small number of games with the champion, and only in ranked.
The Solution
I think it would be a great QoL improvement to solo queue if your ranked champion pool only consisted of champions you have finished at least <insert minimum #> games with in any game mode. I think a reasonable starting point for this number is 3 games. This could be 3 ARAMs or 3 Custom games vs all bots, whatever, just enough to familiarize yourself with the champion.
Reasoning
Ranked shouldn't be the place where someone plays champions to "try them out". It really hurts your team to be inexperienced with your champion. I'd actually prefer the minimum be something like 10 games, but I understand that would be prohibitive for a lot of people, so I think 3 is a good compromise.
Alternatively, if this is strongly undesired for some reason, could we get some Elo adjustments based on champion experience, similar to what happens in Team Builder?