It's already been pointed out in this thread that none of Tolkein's rule's are being broken by atleast having black people as dwarfs as they never had a stated skin color, and ya you don't need to say it when the thread gets bumped and that was the topic and you just happen to jump in with your comment, you can pretend it's not what you meant but every one knows it is.
and again there are no roles not originally in the show as this is completely new series not based on any thing other then the universe it self, but ya I'm all for giving black people roles Id also be all for increasing those roles to what never number you deem need for you not to count them as token but I doubt you'd agree on that. Same thing with Hispanics and Asian's I'm all for giving them representation though again I bet you'd disagree if they actually put some in Lotr.