You guys can keep hatin, but I'm lovin this season of Dexter. This new big bad is awesome. All of the subplots are actually connected this season too, so we're actually seeing stuff that isn't completely irrelevant.
And with next season being the last, Dexter has to be getting exposed soon. With LaGuertta hunting down the Bay Harbor Butcher, it's only a matter of time before she finds out that it's Dexter.