I'm...disappointed. People here mused that the entire 8 seasons undead plotline would be wrapped up in one episode, I couldn't believe it would be that simple...lo and behold, it was. Looks like Cersei had the right idea all along, which in retrospect means that everything team Dany did in the second half of Season 7, including the Wight Hunt and the truce, helped Cersei's cause.
As per usual, the grand spectacle leaves a lot of unanswered questions. Like for example, what is Bran's purpose after all? He didn't contribute anything to the battle other than warging into some ravens to do...what exactly? Annoy the udead dragon? Was it even shown?
Overall, why does the 3ER even exist and why was the NK so obsessed to him? He called himself "the world's memory" but prior to Bran returning to Winterfell, nobody other than the Reeds and Bran himself was even aware of his existence. After Bran arrives at Winterfell, the only thing he contributes to the good guys' cause is spoilering Littlefinger's non-sensical schemes. .in regards to the NK and the AotD, he did nothing that defied or undermined his actions in any way. He wargs into some ravens to see that the dead are coming - which people already knew - and other than that just sits around. Pretty much the only thing he actually does is drawing the NK to Winterfell. So, seeing how the 3ER isn't actually an obstacle to the NK overrunning the world, why does the latter even care about him? And if he absolutelly has to kill Bran (because reasons) why does he have to approach Bran in person while the battle was still going on, when he simply could have this zombie horde butchering every living soul in Winterfell including Bran, while chilling somewhere in the distance?
I liked some of the visuals. The dragons not really (most of the time, I couldn't really see/understand what they were doing, though I lol'ed when Drogo and Rhaegal crashed into each other. Don't drink and drive.) but the NK emerging from the flames T-800 style, smirking, was pretty badass. As were his totally OP powers of being able to raise all the dead, all the time. That's how I picture undead in fantasy settings - you have to go for the necromancers because you simply can't beat them by attrition.
Ninja Turtle Arya coming flying out of nowhere and one-hit-killing was silly tough, and rather cheap a twist.