I have long (since Boon died) been a believer that the island represented some form of purgatory (although it became a little difficult during seasons 3-5) and that people "moved on" after they got their issues sorted out.
So did the wreckage at the end represent the crash (it looked just like the original crash scene) with no survivors...or was that the other plane...or was that simply an opus to the show?
I was a little dissapointed not to see Anna Lucia and Mr Eko. Maybe because they weren't together long enough to form a bond? I can't remember if libby was in the church. And I assume that is why Desmond did not bring Faraday.
Anyway...I hope the writers/producers do a Q&A...much like those of BattleStar Galactica did.
I think the end of the show was just showing the set. Now, if there were dead bodies scattered around, then perhaps I would have viewed it differently.
Libby was in the church with Hurley.