I don't play her much anymore because she's a very polar character (you're either going to do very well because of a lack of cc, or really bad because of an abundance of cc), but I do think she's balanced. Shunpo is a wonderful escape skill. You can carry wards to give yourself distance like Lee Sin does. You can also do fairly well without your ult, but she requires you be close to your targets in any case, so cc is your mortal enemy in any case. And, unless you're fighting a very beefy bruiser (think Garen or Darius level), you're most likely going to win a 1v1 situation. She has her sweet spot.