1. The first 20 or so minutes of this episode may well be my favourite scene in the entirety of Game of Thrones. Starting off with the piano, you know shit's gonna go down - the piano hasn't been used for a GoT score before, and at first seems jarring since pianos didn't exist in the era GoT is visualising, n so a disconcerting tone is created almost immediately - there's a looming sense of dread but you have no idea what's about to happen. High Sparrow's pride was his falling, too power-hungry to concede evacuation of the Septon.
The buildup was exquisite - from the choir and organs to Lancel's slow, doomed crawl to Margaery's increasing panic, it had me on the edge of my seat.
One thing that really hit me hard emotionally was Margaery's death. I was praying for her to get out - but hopefully this proves that plot armour means nothing on GoT - we hadn't finished with her arc. Instead it was cut short by Cersei, reminiscent of her words to Littlefinger, 'power is power'. For all of Margaery's trickery and mind games, no manner of intelligence can prevent death by wildfyre. But still, this is the hardest a death has hit me on the show, which I know sounds weird, but Natalie Dormer was excellent as Margaery and really sold her desperation during her final moments. The saddest thing was that her character, despite being manipulative, was good-hearted. She cared about her family, right until the end, and she knew what was up but still couldn't stop it. She didn't deserve this. But GoT doesn't care about fairness, and I should've learned that by now. I love how the difference between High Sparrow and Margaery was shown: she was willing to drop her act in order to save herself but High Sparrow couldn't bring himself to accept that something was wrong (or heck, was too proud to let everyone out of the Septon despite knowing that something was wrong).
2. Tommen's death was inevitable but unexpected in the fact that it was suicide. It makes complete sense tho - Tommen finally makes a decision for himself after being manipulated continuously by others. He was a stupid boy, but most importantly, a boy, and so his actions leading to the Wildfyre explosion are more than forgivable.
3. Such a satisfying episode, and Walder Frey's death epitomises that, while also bearing the underlying sense that Arya isn't the complete protagonist we want her to be. She may be becoming too psychopathic for that - feeding Walder his two sons baked into a pie is some fucked up shit.
4. Holy shit that R+L=J transition into Jon Snow was incredible and never fails to give me goosebumps (I've seen it about 10 times).
5. Seeing Dany's fleet was epic, and accompanied by the Greyjoy-Targaeryen-Dragons theme, marks a fitting, hopeful end to Season 6. The wall didn't come down this episode, but I'm sure it will soon, and it's all but confirmed that Bran's mark will be the reason why (Note Benjen expositioning that the wall also involves magic to ward away the Whitewalkers, as a nifty foreshadowing for the audience). Also, Dany vs Euron naval battle hype??