I really wouldn't mind her leaving Celine at this point because I feel all these 'awkward fit' collections with their oversized suits feel like she's done them for a few too many seasons.
Truth is, I only ever loved her first few collections where she kept the cuts much sharper and closer to the body, much in the way Jil Sander would have done. I think those early years are still considered her strongest efforts for Celine. If she is indeed going to Burberry, I think she would be best off to look at that period of her work because I feel all these odd riffs on re-appropriated late 80ies menswear don't relate to a lot of women.