I came to the realization that I, as like what had mentioned above, had underestimated Euron. Can't say I'm overjoyed with what happened but never really cared for the Sand Snakes so yeah, they're okay to go. I did predict that Theon would do that, though. He has so much self-pity inside that he doesn't stand up for himself, nor his kin. I'm thinking that he is saved because he's got better storyline in the future episodes.
I love how everything is falling into pieces about Jon and Dany becoming allies soon. Sam's raven letter arrived just in time after Jon receiving Dany's. Jon and Sansa's scenes were great, as usual. I did understand her point, and Jon's. Hence, I cannot really side on who's Stark has much logic in their decisions.
Arya and Nymeria
I hope Nymeria will eventually follow Arya back to Winterfell.
Overall, I liked the episode. Best scenes were Dany's very own little council, Jon and Sansa at winterfell and Theon abandoning Yara.