Speaking as a fan, I see the author’s point. I disagree, somewhat.
EDIT: One point I agree with is that not every “serial” has to have a movie that caps-off or ties-up everything together. The author sepecifically reference “The Dark Knight Rises”. I agree.
I’d add “Iron Man 3” to that list. No need to tie everything back to Tony Stark, like nothing happens without him, like the universe revolves around him.