I watched last night and am looking forward to balance of the show.
I don't think that the characters that die are transformed back to their normal lives. The reason being that Jack, Kate, Sawyer and several other characters were on the plane but still alive back on the island. There were several of them that had died that were on the plane also. I don't think we will get the complete picture until the last episode.
2 Timothy 1:7 For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind.