New Theory: If my QB and game planning tended to put me in an early lead against almost all other teams, my goal would be to become an expert on holding that lead and minimizing the chances of a comeback. Outside of basics, I would not worry in the slightest about 4QC.
Anyone want to claim McCarthy and the team has that figured out yet? I do agree with Vince that the safest path is the low risk, low variance, time eating strategy. But I am not sure that is the most best way to close out the game with a win. Being a little riskier when you have all the advantages is probably warranted. The Seattle game might have been the worst example because the greatest edge you have is injured and can't play action.
McCarthy is successful and established enough to employ a strategy of eating clock and living with the consequences of that strategy when it doesn't work out. So he is not afraid to use a plan whose principle feature is to enhance the chances of winning rather than avoiding post-game criticism. If he were to switch to pushing aggressively when he has leverage at any point in the game, he is well positioned to survive whatever criticism might occur during the transition.