I rewatched the most recent episode of HBO's Games of Thrones (episode 3). I debated it and discussed it with friends, family, and associates online and offline. I read other people's takes. I heard some of what Benioff and Weiss had to say. Now that I've come down from the sugar high of Arya's heroism I think I can provide more sober analysis of what I didn't like in the episode.
There are three points that bear mentioning. (1) Medieval Warfare is a wonderful magazine, one which I read religiously. My points about military tactics are generally based on my readings of various issues of that magazine and other historical books. Mistakes and omissions are mine. (2) Obviously this is just my pov which I am writing for my own enjoyment and hopefully yours as well. I am certainly not stating that I am "right". The show belongs to the showrunners, not viewers (3) Arya is one of my favorite characters. Criticism of her character arc isn't based in the modern bete noire of misogyny.
The episode was entertaining. I was a little disappointed at the episode's fit in the larger tale. GRRM has shared plot points and character fates with Benioff and Weiss. GRRM believes the show and book endings will be broadly similar, although the paths will differ. I'm no book purist. The showrunners occasionally improved the tale by changing or eliminating some GRRM inventions. For example, I don't think the HBO series should have included Strong Belwas, a not too bright black Daenerys devotee who speaks in the third person and defecates on the corpses of those he kills. The show didn't need vivid description of the Mountain and crew's vicious gang rape of a preteen girl and murder of her brother.
But, when I heard that the showrunners had decided about three years prior to have Arya be the one to kill the Night King, a character not present in the published books, I thought that the decision, no matter how much I enjoyed the knife drop move, was a mistake, and one likely made purely for fan service reasons. Let's discuss more.