This bugs me cause Wan had Avatar powers but he was the first so he didn't have the powers of past Avatars. So really Korra isn't that powerful. She's about the same as Wan because they defeated the same villian with the same power situation.
Avatar: The Last Airbender Zuko 'My father said she was born lucky. He said I was lucky to be born. I don't need luck though. I've always had to struggle and fight, and its made me strong.' My favorite quote from Zuko