My biggest complaints from game one for Carson were a) a few of the sacks he took and b) his yards per attempt.
If you look at his rushing yardage without sacks, he had 7 carries for 29 yards, that's very respectable given his athleticism. I could even deal with a couple sacks b/c that's going to happen, but 2-3 he safely could've gotten rid of the ball.
And 3.8 yards per attempt is terrible. Part of that is UCLA didn't allow any short throws to turn into big plays, and part of it was we couldn't complete any down the field passes, nor did we attempt many. That said, that number needs to be at least doubled (8-9 YPA is respectable), especially against an opponent like Mizz State.
If Coffman can come away with around 4 YPC (rushing attempts, not including sacks), 8-9 YPA throwing, 55% or better completions, and have no TOs (fumbles or INTs) then I'll be satisfied with his performance.