I was amazed at what Baylor did last year. Usually, a "wide zone" offense in college leads to starry eyed RBs trotting out of bounds behind their OL - ignoring the 4 yard gains while trying to find the touchdown gap. Baylor's sledgehammer RB, Abram Smith, had no such problems as he loved smashing those tough yards out. Baylor would waste time, bash for first downs, waste more time, and get a few point here and there. That was perfect because they had 4 or 5 really good defenders that could keep the games close. By shortening the game and limiting possessions, they gave themselves a shot.
Baylor lost all those defenders. There's no reason to believe new guys are just going to suddenly play to that level. Offensively, they lost that RB. Something new is going to have to show up. Their QB has like 3 games of actual experience, and the receivers have like zero actual catches.
Jeff Grimes (Baylor's OC) did a wonderful job of matching players to his scheme last season. It was just coincidentally exactly what he ran at BYU. The question, then, is Grimes a brilliant OC that can tailor his offense, or did he just happen to get the right players for what he knows?