I'm just a bit fed up, really.. He didn't have much of a purpose in Season 4 and everyone is glad he is dead.

I'm confused as hell to why Christian was there before the C4 exploded saying "You can go now Michael..." AND!!! Why there was whispering there. Usually there is whispering when the Others are around and seeing how this mysterious Christian is with Michael on a boat with no one else around they don't explain anything about that...