To be clear, TLOU2 has some interesting and unconventional story beats, yes. But it is told in such a conventional way, which is not how I think a video game narrative should be judged. Your last point, for example, is something that have been done in so many other games.
But in the end, I am just trying to rationalize to myself why I left the game underwhelmed.
I suppose I weigh originality too much, then. But looking at another medium, the books that are often classics are the ones that have a completely fresh take on the medium e.g. Ulysses by James Joyce.
In any case, I left the game underwhelmed, and this is how I rationalize it. I am not trying to downplay the game, just giving my experience with it.