I agree with a lot of what you said, but a couple different points of view...
Hamdan looked way better than Fitz. He was calm and cool running the offense. He saw the whole field and delivered the ball where he was supposed to. Fitz wasn't bad, just not even close to the Chroisen One.
Eric Wood did look better than Levitre, but he got manhandled a couple times. NBC showed one play where a 3rd string DL drove him easily into the backfield, collapsing the pocket in the process.
I got the opposite impression of Roscoe. It was more a reinforcement of how Turk needs to find ways of getting the ball in his hands. He's a underutilized weapon in the Bills offense.