I looked at our offensive possessions in the second half. The first possession we scored on first down with the long bomb to Jones.
Then, we had the lead for the next 4 possessions. During those possessions, we ran the ball 9 of 25 plays (not including punts). All four possessions started with a run play. The first two possessions started with Hall running the ball twice to open the possession. The third possession started with Lang running the ball. The fourth possession started with Hall running the ball.
Once we gave up the lead 21-20, the next possession included 4 passes, a penalty and a punt. The last possession was a mix of passes and runs.
It doesn't seem that the staff stopped feeding Hall the rock in the second half as the OP suggests.
Then, we had the lead for the next 4 possessions. During those possessions, we ran the ball 9 of 25 plays (not including punts). All four possessions started with a run play. The first two possessions started with Hall running the ball twice to open the possession. The third possession started with Lang running the ball. The fourth possession started with Hall running the ball.
Once we gave up the lead 21-20, the next possession included 4 passes, a penalty and a punt. The last possession was a mix of passes and runs.
It doesn't seem that the staff stopped feeding Hall the rock in the second half as the OP suggests.