Beau Knows
Registered User
If the lord of light himself suddenly showed up with no warning and melted the NK, THAT would have been a Deus Ex Machina.
Also they established Arya can be so quiet that the only sound that could be heard was the dripping of her blood.
True, if there's any issue with Arya killing the Night King it's only that it could have been executed better.
Maybe they could have shown it by cutting back and forth from her racing/sneaking there to the Night King making his way to Bran. Sure there'd be no surprise over who was going to take him down, but it would feel less like it came out of nowhere and would still be suspensful.
I also liked Arya getting hurt and losing it for a while. She's still just a kid so it makes sense for her to become so frightened, and it makes her feel less like a robot-assasin.