This is a tough loss, but Nick Barnett wasn't playing at a high level currently. I thought he was very average so far.
I'm not sure what Bishop can do to improve anything. He's a tad under size too and I expect him to get ran over by opposing teams backs as well. It does give him good playing time though. He might be a little more disciplined at times, but if I had to choose, Barnett would be in there in a heartbeat.
We'll see though.