I think Miley Cyrus has every right in the world to change her style. She doesn't have to be the Disney's girl-next-door Hannah Montana all of her life. She's older now and she wants to be something different, so gosh, let her do it!
I think this song expresses really well how she wants to break free from the press and everybody trying to tame her down and make her something she's not. I personally think she's a good role model, even though she's not super-Disney-like anymore. Go Miley!