[RajT88]

You are giving that show wayyy too much credit. (Bonus points: read the JJ Abrams interview about the magic box on his desk)

It was clear to me by the start of season 3 that the writers had no plan, that they were making it up as they went. That is why they had filler episodes, one which introduced new characters only to kill them off at the end with 0 impact on the overall plot.

The finale was more of a Rorschach test for what you thought the show was about. I even tested a friend of mine on this, making a convincing case about how the whole show was the Island bringing to life the gay subtext between Jack and Sawyer. (She is still raw about that)

I think the best way to understand the finale is with a Nihilist bent: it's whatever man.