For me, the episode was a greater disappointment than the season opener. Daenerys is being hammered down into one more plot device: Jon Snow's Euron Greyjoy. I fear that the purpose is to set the scene for a formulaic, one-winner-takes-all conclusion and, perhaps, another generation of absolute rule.
"She's a mad Queen!" "She's a bad Queen!" The showrunners are trying to sow it both ways, realizing that neither supposition has been sufficiently supported up to now, when they need to prosecute their own show trial, and whisk her off the stage. So they aim to drive her mad or bad or both from anguish, so that she will prove them right by using her (living) weapon of mass destruction to annihilate civilians. The same tactic that ended World War II, except this time, by order of that most fearsome force in any world: an angry woman.
Two mad, bad Queens in Cersei and Daenerys, neither with a legal right to the crown they both claim, and Dany as well as Cersei now being cast as someone who, in Westeros, would rule only through fear. Each soon to be mourned, despite her faults, by her better -- her younger brother and her nephew, respectively -- more humbled by life and more noble by nature.
The only scene that moved me was Jaime and Brienne's parting. Both actors were superb and I was moved by Brienne's weeping from the stench of Jaime's self-hatred, and the guttering out of his soul. At the time I thought that Jaime was sincere in his words to her, and was heading to Cersei to die at her side.
But I've always thought that it was Jaime and not Arya who must kill Cersei, for reasons having nothing to do with vengeance. If so, I'm dejected that the show had him lying to Brienne "to protect her." Enough protective lies told in Winterfell, especially to women by men who profess to love them. Especially, in this case, by a man so much weaker than she.
And then again, perhaps Jaime's headed to Dany's camp because he intends to kill another Targaryen monarch. With a sword in the back, and for the same reason: to prevent a family member's execution and King's Landing from immolation.