Ugh. It's a stupid move.  I mean the lore goes back thousands of years and the ancestors or bloodlines in the area are a point in the story. So like while there are only few references identifying the characters as white,  making them not so goes against the lore. Further like they rationalize it saying oh peddlers and there like could have settled. Though again it's a identified thing that the area is super isolated there was only ever one character that was an outsider. They should have just copped to it and said we're doing this for a more diverse cast to have better representation to appeal to a wider audience.  That all aside im more concerned with Perrin being so small than I am him being black. If he can play the role, bulk up, then whatever.  The few characters they changed race aren't a big deal.  Like minor continuity issue since their skin color almost never comes up.