Credit where it's due, GRRM has published dozens of novels and is by all accounts a very, very accomplishments author.To have this discussion is a little crazy. You mention Ocean and GRRM in the same sentence? One who is an accomplished writer and the other who couldn't put a plot together if his life depended on it.
But he has, quite literally, lost the plot with ASOIAF. The first three books came out within 2 years of each other and after that he lost all ability to deliver and when he does he goes into long tangents to the story that didn't advance the plot but built the world out. Look at the Brienne chapters in the latest book, it's a lore dump of backstory and unnecessary world building of events from 30 years before but doesn't actually affect the main plot in any way. He could have cut all that out and not a single thing would have changed.
You can't rework a published book in the same way you can rework an in development game, but I would count devoting a significant chunk of your page count to the historical significance of an apple orchard 30 years ago to be bloat.
He started really good, but at this point he isn't making any progress. I am a completionist and like playing games to death before moving on from them and never returning. I just can't see myself getting that heavily invested in a game that has an expected completion date of 2050 and also a tendency to rewrite everything that's already happened. Same as I won't start reading a book series where the author can't get a book out within a decade.
So I mainly go for completed games if I can, or if not, I go for games that are relatively linear so I can just pick up where I left off later.