Despite all of things I thought were poor about this episode, I did like the way the NW story-line is being developed, apart from the Thenns, and The Mereen scene was quite good too and sets things up decently. Also, one positive change is with Daario. Like many, I couldn't stand him from the books, but he has been changed for the better in the show. I love Strong Belwas, but he is ultimately dispensable, and it is totally understandable that he has been replaced.
Arya/Hound is ok, but they have basically been doing the same thing for 4-5 episodes now. Surely they won't pad it out anymore.
PS. Anyone else notice that in the Dragonstone scene they seem to be talking really quickly?...like it was sped up or something!
Edit- Also, Tyrion had a great line, something like 'Cersei is the only person I am sure is not responsible for Joffrey's murder...which makes it unique so far as murders in Kings Landing go"