After watching last night. I woke up this morning thinking about the numbers assigned to the Losties and Valenzetti's equation.
I think it is not about one person and one number, but a combination of numbers. Just like Valenzetti's equation is a theory of numbers that bring about the end of the world, the Lostie's numbers are the combination that bring about the end of "the game." It only ends once:)
Also wondering if anyone else heard whispers in the cave in episode LA X part II when Kate when off by herself and Jack was searching for her? I have listened a couple of times and feel there is something there, but noone else seems to have noticed. So maybe I am just imagining it.