Lets talk Master Yi (garbage champ)
In every single region Plat+ elo he has a negative winrate between 46-48%. You can build him On-hit or Crit, but this preseason the on-hit build is dead because he can't assassinate the squishes fast enough. He is countered by every meta jungler in the game like Sejuani/Rammus/Khazix and so on. In season 7 on the big servers like NA, KOREA and EUW there were no Master Yi mains higher than Diamond (because the champ is garbage). With all that being said can you honestly say the champ doesn't need buffs? Just because a champ is god-tier in silver doesn't mean you shouldn't look into the champ. I feel like no champ should have a 46% winrate in some regions Plat+.