I wouldn't call her broken but she is without a doubt overtuned. She is among the class of champs that profited immensely from the new retarded mastery system. Like Ezreal. I wish we could just remove these bullshit masteries and go back to a system where, before stacking dmg on every fucking champ in the game became the absolute depth of strategy.
Safe champs are the strongest now thanks to how easy it is to shit out damage, even from a long distance, alas, the game has become more boring and binary than ever, not to mention, become more like Dota, just without the turning rates and massive mana costs to gate bullshit.
Honestly Riot, if I want to play Dota I will play Dota, if you intend to turn league into Dota, then good fucking riddance. Enjoy the success that will undoubtedly follow.