Not only that, of ALL the genres, Sci Fi fns are more than willing to play rewind and redo things differently.
Sometimes they give excuses like "Time Travel" or "Alternate Reality", and sometimes they just say "F-it I liked the old show, bring it back!".
For this old thread there are many that are bouncing around that I agree with, the biggest being Arrested Development.
But the thing that gets me is that for a clique-y kind of cult interest show, you REALLY need more than a pilot and half a season to get a genuine following.
They are too concerned in making big bucks immediately than getting something that may make them Boku if they they are just a bit more patient.