I don't think we'd have the OL for his system either. Here's the size of his starting OL this year:
Joey Claybrook - 6'6" 290 lbs
Corey Dublin - 6'4" 300 lbs
Christian Montano - 6'4" 300 lbs
Keyshawn McLeod - 6'4" 305
Ben Knutson - 6'9" 325 lbs
We don't have the length or size that it appears Fritz wants in his OL. Montano and Knutson are also both transfers, so Fritz also had to look around to fill some holes. We also would have the same personnel problems when it came to having no TEs and few true slot receivers. It's worth noting that the starting slot receiver and QB (considered "pro-style") for Tulane right now are also grad transfers from Oklahoma State and LSU, respectively. I think it's clear that CPJ's system is closer to Fritz's than Coach Pat's system, but I think Fritz would have had to work the transfer market a lot here like he did at Tulane to get the right pieces in place.
He's also pretty old at 59 years old and he's never been in charge of a P5 program before. The only head coaches that are older are either proven coaches that have been at their destinations awhile (Saban, Ferentz, Dantonio, Cutcliffe, Wittingham) or they're guys that programs rolled the dice on in order to spark some magic (Herm Edwards, Mack Brown, Les Miles, Lovie Smith). It's tough to say how he would have adapted, especially since Tulane took awhile to get running too. It just seems like a major red flag that despite his success he's not getting any chances to move up, and I think that ship has sailed for him.