With Vogel they had a chance to really tell us about Dexter's past, and his father, and they fricked that up too.
I was exited when from the get-go we found out Vogel knew him and that she was responsible for "The Code." I was also excited when she seemed genuinely surprised that Dex seemed to have feelings...something he has been struggling with coming to terms with over the last few seasons. Dumped the Dark Passenger stuff, etc.
What I was HOPING FOR was that she would come to realize that she and Harry were wrong about Dex, and that while he was a troubled kid he was, in fact, NOT a psychopath/sociopath and that with their code they had turned him into a serial killer. That would have been interesting, and would have answered an number of things that have happened throughout the years. Now it looks like there will be yet another showdown with another serial killer and then some wrap up stuff and then curtains.
At this point I'm watching more out of habit than anything else.