I think when you approach any adaptation, there are two ways about it, and it's also possible to have a mix of both ways. One way is to do a very faithful adaptation that takes both the tone and the sequence of events from the original material and presents it on screen in the best way possible. Another way is to take the essence of the material, and while keeping true to the tone and characters of the original material, craft a similar but unique story which best fits the vision of the adaptation. I'm not the sort of purist who nitpicks at every minor change or a minor character moment being cut out, or someone's eye color being wrong. I enjoy both sorts of adaptations, and in most cases I find that I prefer the latter format because I don't like watching the exact same thing I already read.
The problem I feel with GOT is that it is neither. It does not satisfy either condition. If taken as a straight adaptation, it takes too many liberties and cuts too much development and content to satisfy someone looking for a faithful adaptation. If taken as a loose adaptation that remains faithful to the tone of the books, that doesn't really work either. It feels too cheesy and cheap, the acting quality is inconsistent, and the season thus far really lacks high points of appealing drama or intrigue. Instead it's scene after scene of characters with bad actors doing or saying dumb or bad stuff.
The high point of every episode is basically a)
the opening credits, b) Tyrion and Arya's scenes. Everything else pretty much... well... sucks imo.