It makes them very difficult to rewatch when you know how weak the resolution to the mystery they're setting up is. I mean, they set up all this intrigue then basically handwaved the mystery away. For a show that's largely about questions surrounding the setting and situation the characters have found themselves in, this weakens the whole show.
Speaking of which, regardless of what some people say the ending didn't give a worthy conclusion to the characters, either.
Really the ending just came off to me as a mix of a weak attempt at wrapping up the plot as quickly as possible, and a weak attempt at emotional manipulation. Put the two together and you get rushed, bad television. It failed to be conclusive, it failed to be emotional, it failed to be entertaining.
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^Poorly disguised anti-caps sig