Over all I thought the Season was great, it was much more like the original seasons, the good seasons. Over all I think it's the proper way to end it and is how I thought the original Series should have ended, Deb should have killed him instead of Harrison and survived to raise Harrison as a normal kid, instead of Dexter leaving Harrison with Hannah who was a murderer herself....bizarre choice.
So yeah the Finale was sad, it felt more like an end of an era than the original ending which is pretty good going really after all these years, it felt like the ending that Dexter deserved as much as I liked him, especially after he killed Logan to escape, that's not part of the code, harry would not have approved and I'm glad Harrison didn't either.
I hear there's talk of another Season focusing on Harrison and I really really hope that they don't do that and make the same mistake again that they made with the "1st" ending. Don't make another Dexter without Dexter ffs and don't spoil the character development of Harrison by having him turn into a serial killer anyway after killing his dad. Please don't. You did good, quit while you're ahead!