Azir: E nerf was too much

From Bronze-Diamond, his winrate is around 45%, here's where it's weird: at Masters+ his win rate ranges from 45%-57% not the worst but since he's so hard to master there's just something Riot has to look into, should average win-rate champs be really tough to master? i think not, i dont think champs should be dumb proof either, there has to be a balance, i think the opposite of Azir is Garen, Garen is too easy to play and has really good win-rates.