I think Manny is resisting a spread offense because he wants to protect his defense. A lot, if not most, spread teams seem to have bad defenses. An over-simplification, sure, but we all joke the Big 12 can’t play defense. As a DC Manny believes in the old school idea of slow, methodical drives to rest his defense and keep the opposing offense off the field. Analytics prove this works, technically.
The modern game has changed, however, and hopefully Manny sees what Coach O did at LSU and realizes its that way or the highway.