George Martin was fully involved in writing the ending with the writers of the show
When he does the books the ending will be the same , the battles will be the same just will have a lot more meat on it as you expect from the books
I thought the ending was perfect
SPOILER (Tap to show)
Yes it was nice and calm and bland and boring and basically a shadow of the great show it once was.
I literally felt nothing for a single character in their final scenes as I was numb from the monotony of the whole episode. The f**king CGI dragon rendered the only tiny bit of emotion in a scene that didn't even make any sense.
Anyway it's done now.
GRR has already announced after the finale that his ending will be different to the show which I find both hilarious and clever. It guarantees they will be massive sellers as everyone will want to read and visualise how the last two seasons should have went down.