Darlton just said that to cover up for all the stuff they didn't address... "Nothing to see here, move along, move along..." 
I'm just playing at this point -- those aren't truly "unanswered questions" but more like just odd little things I noticed.
Didn't darlton say if you still have unanswered question you missed the point of the show...just sayin...continue...
NO i AGREE Madam P! that's just B*LL S*IT. Missed the point my A*S.
Cowboy, sorry but if you except that you are more gullible than i ever would have thought. They Cr*ped out and gave us this lame excuse. and everyone is like" ooooh yeah, ok. it's tptb so it must be so wonderful. they are Gods ,so we should just be happy with it like they tell us to, or we "don't get it"." way to try and make ppl feel stupid if they don't like the finale or if we don't except the fact that they strung us along and acted like they knew what they were doing. 
Finally, someone says it! Thank you Mrs Hume for the most refreshingly honest post in this forum.
LOST was all about the mythology of the island! Any old television series has human drama and character arcs. LOST would not have been the phenomenon that it was if not for the mythos, and to pretend that an emotional resolution is "the point" is both smug and ridiculous. I am astonished that more people are not more upset about the monumental letdown that was the final season of LOST (not just the final episode). The creators strung us along for six seasons promising that there was an explanation for everything and in the end their answer is simply, "...and everyone lived happily ever after (in an ambiguous next phase of existence)." REALLY?!?!? Really!?!
Don't defend the series merely to make yourself feel better about investing your time and energy in a story that failed to deliver in the end. Just like Sawyer, the creators were just really good con artists. They led us to believe that they were going to tie it all together and then, as always, left us hanging.
More important than there being so many unanswered questions is the fact that the series was packed with so much irrelevance and inconsistency.
First, a huge amount of time was devoted to establishing that Walt was special and that whole theme was just dropped when he left the island. It reminded me of "The Shining." The kid is gifted, but so what? In neither case did the special abilities advance the story. Red herring? How about WASTE OF TIME!!! I understand that the young actor Malcolm David Kelly hit puberty and that was a problem for continuity, but the writers really should have thought of that before they started down the whole “Walt is special” road!
Second and much more important, the story had two villains who were forced down our throats as heroes (Ben and Jacob) and one hero who we are expected to accept as a villain (“Smokey,” a.k.a. “Man in Black”). Smokey a hero?!? Perhaps not, but he really is less a villain than he is a victim. Let’s recap his back-story.
Man in Black started out as an inquisitive youth (Boy in Black), born on the island and curious about the world “beyond the sea.” He eventually learns that his “foster” mother killed his real mother and has been holding him against his will to fulfill a purpose he doesn’t understand or appreciate. He decides to leave “Mother” and live amongst the men (original “Others”) marooned on the island because he thinks they may be able to find a way to get off the island. He tries to convince his brother Jacob to come with him but Jacob is content to stay with “Mommy.” Even after learning the truth, Samuel only kills his “foster” mother (kidnapper) after she sabotages his efforts to leave the island. Then the poor guy is slain by his own brother Jacob, who oddly chooses to do the bidding of that crazy bitch rather than accept the truth that she is some kind of evil sorceress! He takes her place, continuing to hold his brother (now inexplicably transformed into a smoke monster after Jacob floated his body into that glowing “heart of the island” cave) captive on the island because “Mommy” said so. Then, he targets unwitting candidates to relieve him of his duty and in the process ruins their already troubled lives and even gets some of them killed. Yet, Smokey/MiB is the bad guy and Jacob is the good guy?!?
Perhaps this is some kind of subtle socio-political commentary about blind allegiance begetting tragic irony but if so, that is a pretty weak basis for mind-f***ing millions of viewers for six consecutive seasons. I think the more plausible explanation is that the show creators found themselves with a golden opportunity and blindly led fans through a labyrinth of dead ends, finally concocting an escape plan for themselves after realizing that they would no longer be able to contain dissention in the ranks of their followers.
I have to credit my wife there. She predicted this outcome two seasons ago and stopped watching while I, like John Locke, held onto faith that I would someday realize a purpose that did not exist. Let’s all just admit that we were duped and move on with our lives.