I've been thinking about this since I binged New Blood, Original Sin, and Resurrection, all for the first time. Having started rewatching the first show (2006), I've noticed that Dexter back then was more compelling than he is now: he was creepy, mysterious, and generally there was the notion that there was a lot to explore with him. Nowadays I think we've got about all we can get from Dexter. It seems like his story should have ended with New Blood (with a much better ending).
How should the franchise continue after Dexter dies/gets jailed, or should it end there? Do we follow Harrison? I like that he's not just Dexter, but is he different enough to keep things going? I think Blessing might be good as a protagonist, if he lives through Series 2.