Fellas, fellas. Back to the premise of the string:
If it was up to you, what would the mercy rule look like?
Once a 'mercy rule' goes into effect, in essence, the game is over. The winner has been determined. I think we should play a modified scrimmage at this point, where score doesn't count.
Seriously - what is the largest number of points overcome by a team in the 2nd half? 32 points? Buffalo was losing to Houston 35-3 in the 3rd quarter and came back to win, and that was BEFORE the 2 point conversion. So, 35/36 points is a reasonable score advantage in the 2nd half to 'call' the game.
Perhaps do something like Carolina's old rule (is this still in effect down there?) Maybe give each team 10 plays from the 20. And go back and forth, but don't count the scores. And keep the clock running. This will give the losing team a chance to practice.
However, injuries might hit, and who wants their star player injured in 'scrimmage time'? What about a team completely over-matched. The 'scrimmage' would be like pouring salt into a wound.
Why not just make a point-difference where the game is over, like some baseball mercy rules - up by 10 runs after the 5th inning, game over?