I think, and this is my very limited point of view talking, that the response to Writing The Other, or just Writing POC In General, is: research what you write, know what you're talking about, think long and hard about the character roles you give your POC when they have had a history to being relegated to only a handful of very specific character roles/identities. And don't be a douche when someone tries to suggest that your portrayal might have been flawed.
I mean, you wouldn't write a book about medieval England if you didn't know a castle from a monkey's behind. Nor would you write a story about a roadtrip across America if you thought it was a half-day drive from Washington to Tennessee. Obviously, writing about POC is somewhat more complex in that you DO have to consider how you are falling into tropes or common characterizations. But a lot of it just has to do with NOT talking out of your ass.
Anyway, this is a fantastic, articulate entry. Thank you! : ) It has been really heartening to see SF/F pros speak up about this.