Question about Texas Bama game "relative" to Bama's schedule and A&M's victory.

First of all, hats off to A&M. They didn't close a lot in the past, but they proved under Sumlin they can close out a BIG close game....the biggest of games. Now my question. DId the toll of the schedule catch up with Bama? Soft at first and then State (a big physical team), LSU (a huge emotional and physical game with a clutch win on the road), and then the frenetic pace of a fired up Aggie team. It looked to me like Bama's D was dragging second half and in my humble opinion the great Saban has been out coached 2 weeks in a row. My theory of why has to do with the way the schedule was this year for Bama. On a graph in time versus difficultly, it kinda llooked like a backwards L up to now.