Actually , there was much more improvising the scripts at the beginning of the series than at the end . ABC fasttracked LOST and Damon Lindelof was left to figure it out as he went after the pilot . When the show started , Abrams and Lindelof had some ideas that would make for an interesting pilot that could serve as a basis for a show about more than just crash survivors . There was no reason to spend days creating a fully fleshedout mythology when ABC was sprinting towards production and they didn ' t even know if the show would get picked up . Part of the reason why there are so many mysteries is that the writers kept opening doors without knowing how long the show would go on . In season 2 , the writers didn ' t know if the show would continue on for 8 more seasons or be forced to end from . High budget . It is much easier to write openended mysteries than it is to solve them . I think Season 6 is definitely more focused than Seasons 1 and 2 when it comes to the BSing factor .