Yes, that's my problem with the look. The bag. It just ruins the flow of the whole look. That's why Keira would've nailed it with her signature sleek hair (don't like Marion's bun) and lack of accessories. Also, I think Keira is taller.
^Interesting you say that, the whole look is so sleek and chic, it reminds me of her Parisian style that I've missed since post-Oscar win. Raf Simons is definitely the best thing that has happened to her, fashion-wise (after Gaultier, of course). His designs suit her so much.