That episode broke my heart into tiny pieces, stomped those into even smaller pieces, and then pissed on them for good measure.
Summer sacrificed to Winter. Hold the Door. That was the most intense ending of the series, maybe.
Bran warging within a warging? I guess it's inevitable that he's going to change the past... but does that mean the end of the series is a bunch of terrible events, stuck in a loop, because Bran tried to stop it all, only to set it all in motion?
Also, this episode very clearly drew the lines for the final battle, or else is being very subtly misleading. Dany is gonna need to get her Dothraki across the sea, so she's gonna use Euron's ships. She's gonna team up with the Red Priestess after Jorah is cured by fire, because fire.
Across the way, Sansa and Jon Snow are gonna end up being team Ice, because Bran is gonna be like, "the White Walkers can't help their existence. It's our fault, because people are inherently a shitty species, and dragons wreck the balance of nature. Winter is Coming to pwn that dragon ass. Oh, and the Night's King is our great-great-great-great-great uncle, so he's cool either way. We gotta stop the Dragon lady."
That leaves us to figure out how A Girl and all the players in King's Landing fit in.
EDIT: This also leaves the question of how Melisandre and her counterpart reconcile their beliefs about Azor Ahai.