I'm a big fan of the show, but he does have a fair point to a certain extent. Some of the dialogue/storytelling in Season 5 was dreadful at times, and I think there's been a bit of a decline ever since the RW.
Worryingly, it feels like the show is increasingly focused upon being shocking, with plenty of major twists, as opposed to actually being well crafted and interesting. One of the previews with comments from reviewers/journalists focused on how much the show shocked everyone, and even the trailers seem to be resorting more and more to "sword fight/sex/more action". I'm hopeful 6 will improve on 5, though.