League could learn something from hots
Heroes of the storm locks characters behind a wall in ranked if you haven't reached a minimum of level 5 on them which is the equivalent of about 10-15 games depending if they are wins or losses. This measure keeps people from first timing heroes they don't know anything about in ranked modes, I know this board is full of people who will advocate for people being able to pick characters whenever and wherever but ranked is supposed to be a competitive environment not your personal practice tool.
Seeing some 2nd time a champ in ranked and then proceed to feed their ass off is never fun it's always dead weight, people should use normal and other game modes for practice not other people ranked experiences. It's not like asking for a competitive environment to be regulated in some way to stay a potential troll or inexperienced player from potentially forcing a loss is a big ask, if you want to try those things out do it in flex as a premade or play norms.