Season 5 closed better than it started. I wasn't expecting happy endings, particularly with some of the most popular characters, so I was OK with how everything ended. I particularly enjoyed the last meeting of the New Day Co Op ("You just cost us 900").
I am sure it was realistic, but I thought the Baltimore Sun story line was a waste. Why introduce such a broad new storyline and setting in the last season?
As for the actors,
Bad: I thought the cast was very strong with a few exceptions.
I didn't like Littlefinger as the mayor. He has a strange accent which was not appropriate for a guy that should have grown up in a big city.
I am not a Sonja Sohn fan. I didn't understand the character after 5 seasons despite the fact that she got a ton of screen time. She seems to just recite lines rather than act.
I thought Chad Coleman sucked as Cutty, and apparently so did the writers because they dropped the character about halfway through the last season.
Paul Ben-Victor's fake Eastern European accent was kind of funny.
Good:
Isiah Whitlock was awesome as Clay Davis. That was a hard character to act and if he went too far it could have resulted in a lot of unintentional comedy. He nailed it.
Dominic West was excellent as the de facto lead. Playing a screw up so credibly is difficult.
Michael Kostroff killed it as Maurice Levy.