I found the structure to be similar to FotR but the resolution of the film feels like a solid stopping point much better than FotR did I think.
Uhhh. I don't understand this at all. I mean, this film ends with them getting rescued - if I hadn't been familiar with the book, it would have felt like Deus Ex Machina
with the eagles. Even knowing the book, it felt like that.
But look at the way Fellowship ended. A man who no one could fully trust because of his fixation on the Ring and his own needs dies a heroic death trying to save the hobbits. Aragorn earns his respect, and with a simple look, he realizes that he must become a leader of Men. The film ends with the breaking of the Fellowship, but, after some cajoling, Frodo realizes that Sam's presence is essential.
Overall, it feels like a lot actually happened
in the film...
I can't say the same about AUJ