I am sorely disappointed, that's why myself and a few others often share our less than rosey opinions of the show.
And again, you miss the mark, again. D&D went into this project with the knowledge the book series was incomplete. They had a discussion with GRRM and apparently knew enough to satisfy GRRM's whims they could competently tell the story. I'm guessing they discussed his book release timeline, and whatever the answer, they obviously went forward with the TV show.
So, they have the written books, book 5 coming out a few months after the first tv show. How they decided to make the original episodes pace, which characters to include or cut, those were all D&D decisions. Had they started the show differently, even further from the books, maybe they're not in the same position now as they are. Forest Gump is a very good movie (I'd say great but there are detractors from it.) The book it was based on? Whoa nelly is that thing wild and fun, but incoherent, and the movie did a lot of trimming, a LOT. D&D had that available to them. The book series was already popular, but not nearly the cultural phenomenon it is now, way way down the list under the LotR. If D&D decided to lean on the books so heavily in the first few seasons that was a narrative choice they made. That's my point, the whole show is about their decisions, not the source of the material. They could've made better decisions then, which would theoretically be more consistent to what they are doing now.
But hey, we both think we're right and the other individual is wrong.