You have to be rock solid in your belief in that efficiency.
You think about it though, and I'm glad you brought his up because it's been one thing I've been looking at all year the same way as you-like what in the hell is he doing? ...it's a refinement of Tresselball.
The old school, defense and field position philosophy was always said to be the "surest path to victory" and I argued my ass off during the Tressel years that that was no longer the case. Offenses have gotten better, they won't make as many self inflicted wounds if you just try to keep it in front of you and protect a 7 point lead with a rested defense.
Early Urban Meyer philosophy was score in volume and fuck resting the defense. Defense is there to get the offense the ball back. This was a swing too far the other way and all that volume dilutes the efficiency.
This is the perfect update, if you are going to compete on skill, because you are beating people with a rate stat while 95% of them are still thinking in absolute numbers/counting stats. "We ran for more yards, we will win"
This approach is sort of like saying I can hold my breath longer than you so I'm going to take air out of the room and wait for you to keel over.
It's fascinating to me and once I saw it, I was even more impressed with the change in Day. It's fucking ruthless and smart. I love it.