^well..I don't think so..I love how gorgeus is she at fashion shows
I like her as a blonde, but I can't say I didn't like her as brunette
She change a lot, blonde hair (before wang a/w 2011) were great because she could stand out from all other blonde, not just for the color but also for the short cut..you looked at her and thought "Who is the gorgeus girl with THAT hair??"
I didn't like the very strong brunette of Wang but the colur she had the following days..a little lighter, her face was amazing..I also agree with you, somethimes the changement is not a positive thing for a model for the reason you said .. But I hope that it is not her case..she has perfect face and great body, she is a good model in my opionion..I think also Linda Evangelista used to change her hair often..I am wrong?