Leona is pretty broken

Ehhhh, she is easily taken down, but yes she seems pretty broken when people do not know how to play against her well

Nah, at low elo people just watch you die when you initiate, then they start to go in one at a time and die now that their CC and tankiness is dead. She can be fairly strong with decent teammates, but good luck with that. Someone like Nautilus does pretty much everything Leona does, but better. Which is sad cause I really do like Leona.

If anything is wrong with her, it's the range on her ultimate. Other than that I think she is fine.