Seven (or was it eight?) years ago I saw a production of "Romeo and Juliet" at the Globe in London that had cast a black actress as Juliet. The production didn't use her colour as a way to interject questions of difference or race in the play; the actors who played Juliet's parents weren't black. The production simply followed criteria for "People of Colour Casting" where the colour of the actor's skin is moot.
The Jackson production team apparently aren't really up to date with current hiring policy, criteria and theory in the dramatic arts.
EDIT: See discussion with other examples in Wikipedia:
Colour blind casting.