Bingo!
The show WAS great. It was one of the best shows ever, in my opinion.
But when they decided to CONTINUALLY add more to the puzzle and never go back and put even a couple pieces together, I feel most people (myself included) saw the ridiculousness of this show. When I realized the producers clearly don't even have the "answer" that everyone is looking for (meaning, they are still writing the story as they go along) I got sick of it - and I think ALOT of others did too. There are interesting things that came up in the first few episodes that have NEVER been brought back up.
It would take 10 more seasons to answer all the questions, and tie up all the loose ends to this show.
And if the time change was to compete with American Idol, that's ridiculous for a couple reasons. A truly strong show wouldn't need to do that, and second it would make more sense to change the DAY, so people who go to bed early could still catch it.
YAWN.