The real question is that if they deviate from source material is the resulting story going to be any good?
I mean look at Fear, they have a blank script.... and so far it's garbage comparatively.
I mean c'mon if they get too far from the comics it's going to suck, and not just because the book is always better than the movie.
I disagree with this. In short, it is saying that the writers have no talent (or already blew their only original ideas on the comic) and cannot create something worthwhile on their own.
Frankly, the only real upside they have by sticking with the comics is in not alienating fans of the comic, hence keeping a dedicated fanbase. As someone who never read the comic I see the show through different eyes than those who read it, and I think the show as a whole is still as strong as ever, regardless of how much it has deviated from the comic.
When I look at shows I watch that are based on good books that I read, I have a hard time both not judging it and seeing it as its own entity. I don't see Game of Thrones as a show by itself, I see it as a show that is recreating the book and starting to deviate. So in that situation I was happy when they stuck to the story and not happy when they deviated.
BUT, there are shows where deviation works out for the better. Bosch deviated from the story in the first season, but it allowed the story to take an original direction that wouldn't have worked if they had followed the books closer. I get to watch season two with "fresh eyes" and I like it.
So I think a lot of what you are saying has to do with your situation. You KNOW the story and nothing short of following it will "be as good". However, my disagreement is more with that idea that an author can't possibly do better once he does it well the first time. Authors seldom have only one idea in their head, and while some can show talent on one story but then never show talent again, usually it follows that if they can do it well once they can do it well again. If anything, I would say that this is their chance to look back and see how they could make the story better, and by doing so they have a better chance of the story improving the more it deviates.
Fear is, IMHO, a bad example of "original" writing. They had to create a spinoff that does not contradict the main story in any way while keeping the author in a box that has already been built, and still expect him to write a good original story. Not saying it can't be done, but it is far more difficult to be original if you are confined like that. It is FAR easier to write the next chapter than to write what happened before chapter 1. Just my 2 cents as a writer.
Oh, and I was not happy that they left us hanging... Even when Glenn got trapped and we all figured he was dead, my feelings about it only lasted a day or two. By the time they got back to it, I was almost disappointed he was still alive. I had already gotten over it, and I simply didn't care one way or another. Even the characters in the story had written him off. In several months I will start the new season and while I will wonder who died, it will be academic in nature, not an emotional investment. They could kill off any of them, or even many of them, and all that would matter is how the story will change after this. But the other night, watching that scene was downright difficult. I FELT the anger, fear, and regret over the situation, and I couldn't have swallowed that "pill" if I were in their shoes. I wanted Negan dead at any cost. And I was gripping the edge of the seat fiercely waiting to find out who he was going to kill off, hoping it would be the Latino chick, but wondering how it would be to kill Glenn, Maggie, or even Rick or Daryl. But now, just a few days later, I no longer feel it. In fact, I almost don't care. When I find out, it will be interesting, but I will be too prepared for any, none, or even all to die for it to really move me.