Biggest thing I'm going to be looking for is if Cam has corrected his mechanism.
When he throws, look at his left foot- is it pointed towards his target? If it flays out (a bad habit of his), he will have accuracy issues.
Does he keep his shoulder pads level and step into his throws? Or will he end up "breaking the chain" (good throws start with the feet, then the trunk, then shoulders, a "chain" of events that end up giving more pep to the throwing motion). There are very few QB's that can get away with bad mechanism, and be falling backwards, and still flick a 55 yarder, like Rodgers, but Cam isn't one of them.
I am aware we are going to try to run as much as possible, but so are the Bills. They will sell out to stop the run and just leave the short game wide open for Cam.
Bills will have their LB's roll up or sit deep.