It depends on if there is Progress.
It is possible to go 2-14 or worse and have issues other than QB. Perhaps the team has a horrible record because they play a first place schedule?
If McCoy progresses, as he should, considering that a RB, WR, and O-line should be improved. Then - WHY?
If they come in and he regresses (HIGHLY UNLIKELY) then, sure. But why would he regress?