Ladies and gents, I present to you the 58% winrate champion: https://lolalytics.com/ranked/worldwide/platinum/plus/champion/Janna/Support/ approaching kassadin levels, and is almost making history (I don't think a champion has ever made 60% winrate, and fully expect Janna to hit this if there is no hotfix).
This is absolutely unacceptable. The fact that a multi-billion dollar company is this inept with game balance (not just blantantly nerfing a champion with a 56% winrate) then the whole balance team should be overhauled. Whoever made this decision should NOT be allowed to make gameplay balance decisions anymore, that's the sad truth.
For those of you curious, the so called "power adjustment," is actually just a huge buff after level 9... which doesn't take that long to get. This is ridiculous and blantant favorism if I've ever seen it.