It's similar to your description of the book, ideal characters doing ideal things. Some scenes feel like they could be trimmed down and convey the same information. The web of characters gets more rewarding to watch past the halfway line as the conflicts start to blossom. The film builds over time and comes to a powerful and satisfying end.

The 1940s emphasis on tall verticality in its art style is on full display. The strict adherence to command in speech seems foreign to me, not having been through the fighting forties.

Yeah its good. Cant say it will have any surprises left for you.