I really enjoyed his character (Ray Stevenson's that is).

The way the season ended is the right way to transition into the final season. Before now, we've known that ultimately nothing would happen to Dexter. But now, he's going to face the full spectrum of consequences that luck allowed him to avoid in previous seasons. The cliffhanger is the knowledge that he and Deb are not going to be able to walk away from this. He had opportunities to have a normal life but ignored them, and he's going to take Deb down with him, so that finally the whole cursed family will be dead.

I guess people will disagree with me, but Jennifer Carpenter has done such a great job with that character.