A balance issue that surpasses winrates.
Playrate. I understand winrates are still very important, but maintaining that winrate with an enormous playrate is a red flag. It's often not just remedied with a nerf, it's usually a problem with the champion. Some champions are way too adaptable and good in almost all situations.
https://i.gyazo.com/5e0f6b80dcf410c727d3f1303e21f10e.png https://i.gyazo.com/3122451b47b6e717393c3cc8036809b9.png https://i.gyazo.com/19d34973ceb7b471d4d192a8a30008ce.png
All of these champions have above 20% playrates along with being in the top 5 for winrate in their respective roles (from OP.GG).