I think it's a challenging draw for Na. Good for her
But the chance of the tough draw falling apart is quite high.
No doubt that Na can revenge Kim this time. Kim is out of form, no warm-up tournaments, old, last tournament. And Na should like and love to do a revenge on her so I guess that's no problem.
Stosur, I doubt she can pass R1 against Martic, Sam is the defending champ feeling a lot of pressure, didnt the well in Cincy or Canada as last year, actually the whole year is not great for her. Even though Na face her, I hope she would enjoy her match, play her best and Carlos should try to figure out how to beat Sam properly.
Maria/Petra/Vika, Petra seems to be the most difficult one, but Na is so in form and super high confidence, she should go through either three of these players.
To add more on the positive, I think Na is in a stage of rocket high confidence, which can make herself believe that she can win all those matches, as well as Carlos is a new and very experienced coach, Na would follow his order in order to do something she havnt done before. She has pretty much chance to the final.
If she won, she would be a real deserved champion. But I hope she wont fall to Watson in round 1