I dunno really. I think it's more to do with the storyline not really progressing as much as it did in the first season, but that's kinda the same thing that's happening with lost as well. I think both shows have gone past the the point of not knowing whether the show will be popular or not (they both are) so they can drag it out knowing they have another 3 seasons afterwards in the bag. I think i'm getting a bit lost as it's been dragged out that much that i can't actually remember what went on in previous episodes, and there's half a dozen stories all running a long side each other.