The one thing that would IMMEDIATELY make ranked 10000000000x better
Quit allowing players to play champions in ranked that they have little to no experience with.
I'm tired of losing games where my teammates have little to no experience on their champion, and they are basically the equivalent of beginner bots.
You should AT LEAST have mastery 4 on a champ before you can take it into a ranked game.
Ranked is SUPPOSED to be the mode where you take the game seriously. I'm tired of people goofing around in ranked and ruining games for others.
but I KNOW you would never want me playing her on your team in a million years.
Similarly, there are people with alt accounts, smurfs, or new accounts who would have to play a LOT just to get their onetrick to a high enough mastery - or people who are basically pretty good at almost every champ but haven't put the hours in. There's also a possibility that they played that champ on the PBE.
There's just too many variables for this to be a viable option.