Yeah in addition to all the good points here, I actually do dislike how characters are being switched to POC at random, because usually their out-of-place skin color is just not acknowledged at all. (I should say, in some settings it really doesn't matter and you can absolutely swap).
And making "European fairy tale but Blasian this time" is absolutely, absolutely done instead of doing any kind of original content set in a non-white cultural setting.
I would love to see 90% the characters on my screen not be white, but it's pretty hollow if they're just literally pretending to be white.
There was a great DS9 episode where they all cosplay 1930's or something in the Holosuites, and Sisko gets uncomfortable because the holosuite program was just pretending racism didn't exist, and treating every human player like respected professionals and members of mainstream society.
It was the only portrayal in Star Trek that I can think of, where those citizens of the utopian future still have to acknowledge that being Black still holds on to some meaning even into the future, especially as residents of the former USA, which Sisko & family are.
There were some other DS9 episodes that talked about race, like the bell riots one and the one where Sisko's mind is going back to the 40's author who has to ghostwrite as a white man.