Some incredible performances this season, particularly that of Salcedo. You totally buy that guys pain all season long. I also thought the Cali heads were quite likeable. Escobar was great to watch, but I didn't find it possible to like him after some of the things he did. Gilberto and Pacho seemed to have some code, at least. Miguel started out that way but the power and paranoia got to him. Chepe was evil but like Pablo, highly entertaining, I would have liked some more scenes of him in New York.
I just read an interview with the show runner who says that he thinks Pena's story is now told and it may well be a whole new cast for Season 4 (
http://www.hollywoodreporter.com/live-feed/narcos-season-3-finale-will-pedro-pascal-return-season-4-1033708). Pedro Pascal has been brilliant in this show but I suppose it makes sense for the character to have washed his hands with it all now.
Also, so satisfying seeing David take those bullets in the finale!