In my opinion, Cate Blanchett is the actress of her time. No one else comes close.
Blue Jasmine is another brilliant turn for Ms. Blanchett. She plays the character so beautifully, it is impossible to separate the actress from the character.
Another strong character in the film is the wardrobe. It absolutely defines Jasmine.
Bravo, Suzy Benzinger. I applaud you.
Here's an good article from the New York Times, explaining part of the process of costume design.