Whew, just got through reading this thread...
My musings and comments:
Loved the movie and knew people here, who can appreciate the tension added by a party members death, would not be whining about it incessantly, like a lot of people are doing on the film boards. I didn't jump at Wash's death, but I had inadvertently picked up a spoiler on that, so I was prepared. I do still have the nail marks my wife gave me on my leg when it happened.
Reavers - read on the movies boards that Joss admitted to a different origin of the Reavers in the movie than he had in mind for the series. Might explain the difference between "Bushwacked" and the film.
The Operative - I don't think he knew exactly waht he was supposed to be stopping from getting out. Once he saw and unserstood, his belief in his cause was stripped and he began to question himself. I could see him not killing himself for failure, as he is suddenly unsure of that sense of honor he had might come from the same place as his belief.
The future - I personally think this movie was done to put an end to the series and open the door for future movies. By killing all their previous contacts, they don't have to worry about continuity in that area. By killing Book, that story no longer has to be told (as Book himself told us in the film when Mal said he needed to tell it one day). The story of River is open to further visiting, but no longer is the burning central thread it was at the cancellation of the series. The only real mystery left from the series is the supposed dark secret of Inara, and that has really only been speculated about by fans, never really been openly alluded to. So with this movie, Joss is free to tell whatever story he wants in any future sequels (oh, please let it be so).