It's too late in the season to do anything about Farrell now. The only question is if FO thinks he's the guy going forward and if they bring him back next year. It depends on how much they value the "off the field" contributions he provides.
I can't blame Farrell for all of bullpen's faults, but I still wonder if Uehara or Tazawa could have been helping us if their innings were managed better.
Farrell does tend to be a batter or two slow in pulling guys and I find it hard to believe that it would have only cost us a game or two. Blah...