I hope that Yasuo and many other champions Banrate's help get them fixed.
Regardless of whether a champion is "OP" or not, some champions despite their winrate have extremely high banrate's and it's because people don't want to play against them or with them. Zed, Yasuo, Fizz, Lee Sin, Darius the list goes on. So i hope that with this new ban system we can see genuine changes to try and fix these champions. A champion being permabanned isn't something i or you like riot, if a champion is permanently banned or even has a 50% ban rate with a low winrate/playrate, something is wrong and not fixing it just emphasizes the mistake you made.
PS: Last line sounded mean but it wasn't supposed to lol i just don't want to have to dread playing against these champions anymore, fixing them would be nice for myself and the main's of those champions cause they'll actually be able to play them.