He didnt get rid of Nicely and Moore. Nicely and Moore did not fit the system. If Pohl is the starter next year, he will have similar or better numbers. Bank on it. There is a reason Williams was a career back up at 1-AA.
Its called a system QB. OK St, Hawaii, Texas Tech, Missouri are examples. All have QBs who put up big numbers every year, but dont amount to anything else once they get to the NFL.