I'd give her three nerfs:
One on her base Hp regen:
rewards her more for hitting vitals and makes people who deny them able to bully her more effectively
A second one to her Q cool down at early ranks:
Her Q spam in lane helps her win trades way too easily so I'd up the CD OR make the refund only apply then she hits a vital
And maybe remove the AS slow on her W:
It's already way too punishing for the enemy and the AS slow fucks up a lot of AA reliant champions/bullies that would be intended to win against her.
I just feel she isn't exactly game breaking OP but just a tad too overtuned, especially since her late game's already so monstrous.