Good call IDKFA.
For a LOTR adaptation I think there should be a more....conventional and literal casting with virtually all traditional european actors other than the handful needed to represent Southrons or whatever.
But for this, depending on exactly what stories they are adapting, it could be more cosmopolitan and global so long as they put in the effort to demonstrate that global nature. A Hobbit from the northern part of M-E that hasn't left their little Shire for 20 generations ought to be a lighter skinned person IMHO. But if there is a Hobbit from another land introduced who is asian, I'm ok with that, who is to say that humans and hobbits can't intermingle anyway (I've seen videos
)? Some elves, or at least known half-elves, could be of a different ethnicity than the rest for this reason as well.
Numenorians could have folks that come in from across the known world, though again I feel like the core "native" population ought to be fairly homogenous within themselves and of course since they were prohibited from heading West, there shouldn't be any NA or latinos cast. Though you might make the argument that ELVES, coming from Aman/the Undying Lands as proxy for the Americas, could be NA?
I still want at least a few eps of this show to depict a flat planet and the weird effects that would have on distance perception, then when the world is made spherical it could go to normal.