George Lucas did this with the Star Wars prequels. The removal of Jar Jar Binks to only cameo character status, adding in Qui-Gon voice only because fans complained his body hadn't vanished in Phantom much like Obi-Wan. The most egregious was Revenge of the Sith where he added in all sorts of things to tie up loose ends and to answer what the fans complained about.
JK Rowling did the same. Everyone wanted her to answer who Grindelwald was (random character she made initially), demanded to know the importance of Dumbledore receiving the invisibility cloak, why no magic worked on it so she made up these Deathly Hallows etc. Every creator gets inevitably influenced by fans and in some cases, what precedes their work. There is no way GRRM won't have what the show has done, how fans reacted to the events clouding his judgment as he's writing, even subconsciously. 'They hated Sansa rape in show, maybe she doesn't get raped by Littlefinger now', 'Margaery has become a fan favorite, maybe I'll give her a much larger role' etc.