ok it's been a while since i've seen the movie, but, i went in without knowing anything about Firefly. i saw the trailer and tasted something i hadn't seen in a long time that i missed - a sense of the underdog and a sense of family in an uncertain future. something i used to feel with xfiles and star trek: TNG.
i enjoyed it a lot, but do remember feeling some things were predictable, but forgiveable, because by the standard, reliable storytelling formulas, these things must be done.
WARNING: "Spoilers" spoilers below
When Sheperd comes into the story, if you are new to the crew you will not know he is a crew member or have a strong attachment to him - and you will expect it when he dies. that's how i felt. he was an old friend who helped out one last time and was getting old for this kind of living, and couldn't always dodge life's bullets - so he took one for the team, so the team could trek on. they weren't in a position to spend time sitting there mourning him so, Mal reacted how he reacted - shock, hurt, and anger, then, move on. but, if you DID watch the show, i do think it's a pretty big loss considering he was a pretty core character, and Wash is also lost by the end (i thought the second death was totally unnecessary and they should have just had him badly wounded).
When Sheperd comes into the story, if you are new to the crew you will not know he is a crew member or have a strong attachment to him - and you will expect it when he dies. that's how i felt. he was an old friend who helped out one last time and was getting old for this kind of living, and couldn't always dodge life's bullets - so he took one for the team, so the team could trek on. they weren't in a position to spend time sitting there mourning him so, Mal reacted how he reacted - shock, hurt, and anger, then, move on. but, if you DID watch the show, i do think it's a pretty big loss considering he was a pretty core character, and Wash is also lost by the end (i thought the second death was totally unnecessary and they should have just had him badly wounded).
to have TWO losses like that is extreme in one film. It's a balancing act, and I think Whedon had to really work out how to 1) keep newcomers engaged and attached to the characters that it's most important for them to be attached to 2) keep existing fans engaged and justified by being faithful to the Firefly world and key characters and 3) get the greenlight on future films. if fox, for example, said there were just too many core characters and it's a hard sell, mightn't he have had to "trim off the fat"?
it's only now i've gotten around to watching the Firefly series and man, it's enjoyable. very fun, very engaging, sharp, witty, unique, original. i don't think it's terribly "adult" and there was one very edited nude scene where you saw as much as you'd have seen in Rodin's "The Thinker."
i'm hoping the movie did well enough and they get to make their sequels. even more, i'm hoping by some miracle the show gets to come back to tv, but i think it's a no-go since major changes have happened to the characters.
also, re: zoe and wash - i always felt really skeptical of those two. comments were dropped in the show that they married because the ship needed a pilot. when wash came on board, zoe didn't like him, but I don't think the series shows how they ended up together. i also noticed a distinct lack of "warmth" between the two of them in the show (they rarely kissed or flirted) but as the series progresses you do see more, it just sometimes seemed forced. i think that's something they may not have properly handled/developed believably in the series, so by the time we see stuff go down in the movie, we get some weird stuff with Wash and Zoe.
sidenote: joss has to get box office delivery on Serenity to get the green light on the rest of the trilogy being made. if serenity doesn't do well enough, there will be no further films. and he has already stated it's highly unlikely there will ever be a return to the small screen. the cast has signed on to do that trilogy, IF and WHEN it's a go.