I'm so happy Nick was killed. Little prick, even Jesus would kill him. Furthermore, say hello to the manifestation of Dexter's darkness .... I sure as hell wasn't expecting that ending.
The writing is a bit lazy lately. One of the biggest movie/tv cliches is when someone is questioning the existence of God and then something they pray for happens and they're like, "could this be God?". It's lame. Also, Dexter just happens to see Travis outside and determines he's one of the killers. Travis shouldn't be there. I don't know. But cool kill at the end, though.
Just watched the final 4 episodes (because I'm awesome and wait for the season/show to be finished before I watch) and fuck the show for that cliffhanger. I thought the season had its moments, it was a little weak (worst episode being "Nebraska") but overall somewhat satisfying. The cliffhanger makes it all good... as long as they deliver next season.