The show has been great. The episode was garbage, especially by the high standards of their season finales. Only good parts were Melisandre bailing on Stannis, Reek pitching Myranda off the wall, and Arya going all Kill Bill on Ser Meryn. Although if Myrcella is dead (and I assume she is, would probably be even dumber if she wasn't) between her and Myranda that means I actually managed to lose two off my top 5 in a single episode. Now that is a true injustice.
Granted, if Myrcella is dead, maybe it's not such a bad thing because now she can never end up being TOO OLD.