I overall really liked the episode, but there were scenes which were not so great. One is of course, the Missandei and Grey Worm see. If anything, it went on too long. We get it. The other is definitely Samwell apparently curing Jorah with forbidden Citadel knowledge he read in a book. Too much, too soon. It's rather unbelievable. I have a feeling he will be a catalyst for more plot advancement to come since he's at the Citadel. He's already helped Jon go to Dany and Jorah now.
The high points are definitely everything to with Dany and Cersei. They're handling it quite well. Cersei's speech was great and made a lot of sense. We know Dany has all the strength in the world, but I like that they're developing that she needs more than strength to conquer Westeros. The Targaryen legacy looms over her, and some of her strength is compromised for that matter. The Greyjoys have never really been reliable allies for anyone. Euron attacking Asha's fleet was fantastic honestly. The feel good moment of Theon and Asha joining forces with Dany was a little too feel good considering their situation at the end of Dance with Dragons. It could only go so far because I doubt they have much of a future in the books either. Who knows though, a lot can happen. I'm glad Theon went out like a coward. It's the only way that scenario could end. The dude has major PTSD from Ramsay, there's no way he can stand up to Euron. At least he didn't start calling himself Reek and obeying Euron like he did with Ramsay.