Or you have to be somewhat predictable, but execute. When the other team knows you're going to run and can't stop you, that wins games. Being "unpredictable", after a certain point, ends up as simply trying to be cute, which does NOT win games.
Ultimately, there comes a time when you have to seal the game by smacking the opponent in the teeth. That time was 3rd and 2 at the Pats' 17 in the 4th quarter. That is not a time to finesse the opponent, it's a time to kick 'em in the head.