I had no issue with the way the characters were killed off. Rarely has LOST been a show where a character death--even a major one--wasn't treated as a plot point. They haven't been treated the way most traditional dramas treate character deaths with more depth and with a little more time to dwell on it . Here it just happens and is all about how it advances the Bigger Picture--not much time for grieving or character reactions--you fill that stuff in yourself which really at times isn't that satisfying because we are already moving on to something else.Lemme ask you guys a question. How would you guys have handled this episode and the death of these characters? Knowing what you know that everybodys fate looks pretty grim.
The island treats the characters as expendable chess pieces and so do the writers. But that isn't a criticism that's just LOST's style.