as others said they telegraphed that Arya was going to be the one to take down NK via Melisandre's 30 second stare down near the beginning and their exchange over eye color in the room with The Hound. But how Arya managed to get out of the castle and by the entire horde without any explanation, I too was expecting some use of faces, they apparently thew up their hands about and hope we didn't care because... Arya!!! And sorry, stealth doesn't explain it. Disappointing.
And no real interaction between Bran and NK after all this? What the heck?
I fear GoT has succumbed to ye old chestnut of CGI over story in this last season. 🙄 Go back and watch some of their early seasons before the computer imagery was so prevalent to see what I mean.