Not really digging this turn of events with "not Locke."
Right now I'm not happy with it either. Or finding our our Losties are merely pawns in a battle of good vs evil.
Maybe even smaller than that. Jacob setting up a chess move to change history so he wont actually be killed. By hand picking some people and setting them on a path to change the timeline then Locke is not around for his foe to use.
But I'm sure they'll come up with something to make me love the idea.