In an interview prior to the ending being aired; the guys "Promised the ending would leave the audience with way more unanswered questions than questionable answers" - I'm paraphrasing but that's the jist. And they've duely delivered... Mind games; just like Jacob.
But now for those of you saying they didn't answer certain questions and then being 'dogged on' for it by the pro-character development crew who think we're either one dimensional, ignorant or 'not getting the point'. I simply ask you this...
What were the promos showing/saying between each and every season finalè and run-up to the new season; throughout the first five (and even sixth) season(s)? Was it things like
A: "Who will Kate choose, Jack or Sawyer? Will Locke finally find some standing room? Will Charlie and Claire live happy lives with baby Aaron!? Find out on all new LOST!"
or was it things like...
B: Who are 'The Others'!? What IS The Island!? Where ARE they (The 'LOSTIES' in other words)!? Who IS Jacob!? Find out on all new LOST!"
That right there, proves a massive point. For six years the creators were playing with a character driven plotline with a mysterious subtext; but at the same time they were toying with a mystery/sci-fi/religion doused plotline cohesive with a character driven subtext.
LOST was about a group of strangers, finding themselves and finding each other. Living, dying, loving, losing and how they coped throughout. - BUT - At the same time it was about science fiction, science fact, religion, faith, fate and every other possible 'fantastical idea' you could possibly imagine.
Did Cuse, Abrams and Lindelof know what the ending was going to be the entire time? I don't doubt it... Was this the ONLY ending they had in mind? I highly doubt that one. Jimmy Kimmel provided us with some laughs showing 3 "Alternative endings" to LOST, comedy style the other night right after The End (2) had finished airing but I'm pretty damn sure the creators have another season or two's worth of backlog they just COULD NOT, fit into the show. - In fact last I heard the show had so much stuff to show us, it was supposed to be 2.5hrs (NOT INC' Commercials) however I found it only to run an hour and 43 minutes.
You are all forgetting one MAJOR THING right here. A very, VERY important thing which I am shocked no-one has bought up just yet... Do you really think THE LOYALIST OF LOYAL FANS of a Television show as successful as LOST are going to be unrewarded? Of course you'll have to pay for it... But I say two words, to all of you.