Euron has traveled the world. It makes sense that he would already have a lot of fast travel points unlocked.
The teleportation is simply a symptom of the monetary/time restraints the show is now under. I don't like it, but I understand why they are doing it. It is pretty ridiculous though to think back on how long it took people to travel. Robert spent weeks on the road to Winterfell and the show spent time showing how arduous a journey it was, yet now characters go twice that distance with no consequence.
Anyways, I thought it was an overall excellent episode. Dany, Jon, and Tyrion meeting lived up to expectations. Dany was all haughty, Jon was stubborn, and Tyrion was smarter than both of them. It's the scene everyone has been waiting for since season one. I am loving Cersei's character this season. Compared to her foolishness and poor decisions after taking command when Tywin died, she is now much more cunning and brutal. That scene with the sand snakes... damn, that was more vicious than I imagined. I thought she would have the mountain kill them, or burn them alive, but Cersei is far more creative than I. She is an excellent antagonist to the idealistic Dany. Though it will be interesting to see if Dany goes full blown fire and blood now that she has taken some major hits and how people react to it.
I see some people talk about how weird Bran was.... and he was, but it wasn't out of nowhere in my mind. He is completely different than before, and is driven by a purpose most can't fathom. Also, the dude is just straight up addicted to the Weirnet. Don't act like you're better when you get bummed once you find out a place doesn't have wifi.
One thing I don't understand is how Olenna is even in Highgarden. She was on Dragonstone last time we saw her. Why not stay there? You had to imagine she knew that if she went to Highgarden it would be a death sentence. At least she went down swinging.
And I'm sorry... I still don't like Euron. He's not as interesting as Book Euron OR Book Victarion. I know the show is the show, but he seems like such a missed opportunity. Can you tell which lines are from Book Euron and which are from Show Euron?
"We are the ironborn, and once we were conquerors. Our writ ran everywhere the sound of the waves was heard. My brother would have be content with the cold and dismal north, my niece with even less ... but I shall give you Lannisport. Highgarden. The Arbor. Oldtown. The riverlands and the Reach, the kingswood and the rainwood, Dorne and the marches, the Mountains of the Moon and the Vale of Arryn, Tarth and the Stepstones. I say we take it all! I say, we take Westeros."
"Let's go murder them."
"Godless? Why, Aeron, I am the godliest man ever to raise sail! You serve one god, Damphair, but I have served ten thousand. From Ib to Asshai, when men see my sails, they pray."
"A finger in the bum."