Last season started slowly, but about halfway in, when Lundy was killed, it got great. Each episode was an intense ride, all of it ending on that incredible season finale.
This season has been nothing like that. I don't care about Quinn, whose storyline has been a much more boring version of Doakes (one of the best characters in this show's history and was killed off too soon). I don't care about the Nanny (who has no problem just up and spending however many days in Orlando until Dexter gets his **** together?) or the kids. I don't care about Santa Muerte because it wasn't appropriately fleshed out. I don't care about Angel or LaGuerta (who, I think in every episode, has that look of realization when someone yells at her, like she's finally realizing she's a flawed person and a subpar boss). And, worst of all, I haven't cared much about Dexter, whose attention to detail, cleanliness and perfectionism have apparently been lost as he hurriedly kills all his victims in the same way: with a knife to the heart. What happened to the cleaver or the electric knife or the chainsaw? He seemed to enjoy killing, and that twisted side of me enjoyed watching him do it. Now? Eh. Get on with it.
It's almost as if the writers, who lost their primary show runner after season 4, threw about 15 plot lines out there and finally had to commit to one. Yes, it has been considerably better the last three or four weeks, but before that, it was miserable. Recently, it has just been average. Season 1 and 4 were just fantastic. Season 2 was good. Seasons 3 and 5 were/have been just plain bad.
I'm afraid that this show has run its course and, without a major shift in direction, such as Deb finding out about Dexter or him getting arrested, it's time to schedule the series finale. If it does continue, they need to find writers who can actually write.