I think its more to do with the fact he changed up the story and it wasn't fully true. If it wasn't for Reed Ned was going to be toast but I find that some of the people who are criticizing how Dayne was killed are the same book snobs who complain about the snow not being on the ground outside the Winterfell walls. But I do think the show in terms of quality has dropped. Even the writing of the dialogue has dropped quite a lot and makes me think that whoever is writing the episodes, it maybe a 13 year old boy.
Besides that, there are some good things this season. I like The Wall, the North and I am hyped up for the Iron Islands.