I don't know if we can call the Blakes polished, did we see her 'skirt' at Chanel?
As for her evolving style, we mostly see her at events when we do get pictures, and while sure you can dress how you want to, depending on the event there is a certain dress decorum-- To an extent at least. I'm sure if there were more completely candid pictures, like that one of the black and blue out fit that was originally posted on The Facehunter, I think she's still have that side to her personal style.
I really like the Chanel Clémence wore, Navy is a great color on her. She looks really stunning.