This felt a little flat to me, though I guess after the intense action of the last episode it was inevitable there would be something of a breather. Even then, we have the growing concern of Jon vs Dany for the throne, Gendry being refused by Arya despite his new title (that was generous of Dany - I thought she might frown at his Baratheon connection) - and then, of course, the dramatic moment when one of the dragons was killed.
Though Dany is angry, I don't seem to recall her getting very upset when any of her dragons die - perhaps her grieving would be covered more in the books.
Also, Varys's pointed remark to Tyrion about his drinking pricked up my ears - if Varys seeks Dany's removal, he has just identified that Tyrion could be easy to poison through his excessive wine-drinking (also emphasized by the drinking "game" earlier.
Oh, and thank goodness we didn't see a love scene between Jaime and Brienne - I was really dreading another gratuitous excuse for nudity!
Euron destroying the fleet seemed a little too easy, as with killing the dragon. Still, it emphasizes that Dany's power is growing weaker in Westeros, as underlined by the limited show of her forces outside of the city walls of King's Landing. Was surprised to see no town outside the gates, or signs of one recently cleared, though.
Jaime heading back to King's Landing can only mean that he aims to kill Cersei. And with Arya joining the Hound and the pointed comment about leaving him to die before, does this mean that at a crucial moment when the Hound is vulnerable against Gregor in their inevitable duel, she does something to help Sandor therefore achieve this? I'm presuming it might involve fire - we will see.
Sansa was a little annoying for pushing against the whole Dany business - it seemed a surprise that after everything she's gone through, Sansa wants Team Stark against the world, when they clearly cannot achieve anything else by themselves. Perhaps why that's why Sandor underlined her brutal treatment before, not least under Ramsey (literally), and hence providing an explanation for Sansa's hardness.
Anyway, looks like a great deal may yet be resolved in the next episode - if nothing else, the final conflict over King's Landing.
Btw - anyone else notice how the opening animation has been changing with each episode? At the start of this one, the inside of Winterfell was shown as wrecked with no moving parts, and that reminded me that in the last episode the lighting in the crypts had gone out - but not in this episode's opening.