As you might have guessed, the Berlin Wall came down between the writing and the publication.
That's obviously what they want you to think!
I was very disappointed that Game of Thrones veered into just another zombie show.
It wasn't a veer. The show was always about the seven kingdoms bickering among themselves instead of facing the actual threat that they could have unified against.
(Or at least it was until the last few seasons were written by someone other than the original author, said author having not even come close to finishing the book series.)
Just look at the first episode. It doesn't start in Winterfell or King's Landing. It starts north of the wall.
> "It can be... traumatic. Because sometimes their creative vision and your creative vision don't match, and you get the famous creative differences thing — that leads to a lot of conflict," he told Fast Company.
1: https://www.thesun.co.uk/tvandshowbiz/10034023/george-rr-mar...
It's an important story to tell, and I think your dismissals are indicative of the same flaw as the characters: thinking the petty struggles they face are more important than the survival of the species.
It's a flaw of these characters, and also of the contemporary society. There's a kind of distance towards "petty struggles" of everyday life that I'd consider a part of being mature.
Related: this is why I like science-fiction, especially the older one that's written/directed by people who focus on ideas, and not people. I hate the modern critique of sci-fi that characters are "flat". If I wanted to read about character development, petty squabbles and love affairs, I'd pick literally any other genre.
I don't think that they're mutually exclusive. Much of the sci‑fi and fantasy I've enjoyed over the years does both.
Certainly there's more tolerance for flat characters in sci‑fi than in other genres because you can focus on ideas, I agree with that.
But if all the characters in your story are flat, it does impact the quality. You can have good sci‑fi with flat characters, but great sci‑fi requires both interesting ideas and interesting characters. (And that's not quite enough either, but that's a tangent we don't need to get into)
GRRM's novels will deal with the same undead hoard, but I highly doubt they will read like 'just another zombie book'. That's what separates legendary artists from the nameless commercial hacks--the ability to take something that has been done to death and make it feel fresh and exciting.