I understand people not liking dialogue (no one, not even the biggest Stans can defend the whole stone floating thing) or the weird scenes with the horse riding or cheesy action sequences but I don't think I'll ever grasp the side of the argument that is annoyed there are black/brown I'd (go on and say 'green and whatever' but it seems green is already accepted) characters on screen.
If they're there, they are there. The show isn't going to be a success or failure because they have diversified the cast. That'll be all down to the writing and the jury is still out.
Hypothetically, lets say the PJ trilogy released today but had a 100% black cast. Everything else remains the same. The writing, themes and the actors performances were exactly as the PJ Trilogy. Would people have had an issue and kept going on about it even though it was the exact same film?