Everyone's made a lot of good arguments that make sense, but really it comes down to how the writers and producers interpreted the books, and how they want to convey it to a new audience. I've always visualised pretty much all the characters as white unless specified by RJ, but I have no issues with the casting. Perhaps the people of Emond's Field will be generally dark-skinned, and Rand and Mat are the outlier? The books are still there for us in their perfect form anyway, I don't need an adaptation that will give me the same experience as the books. Anyway, I'm super super excited for an Aussie girl to play Egwene.