Hopefully, they've got the message now, and this will be the last time they'll have to withdraw a cover due to whitewashing. (Which, incidentally, is not the only unfortunate can't-really-be-an-accident misrepresentation publishers have slapped onto this and other books. Several people have noted the covers of Ask Me No Questions and Secrets of Truth and Beauty, both of which center around overweight young women yet have covers portraying conventionally pretty girls without so much as a chubby cheek in sight.)
Still, this is definitely a step. Yay progress!