I think the big pro with him is that he knows the Babers scheme from the OL perspective probably better than anyone on the planet.
No offense to Cav, but I will remember his time here as a time when the OL was always confused, the best players often didn't play and no one seemed to be on the same page. When you are bring into a new scheme and start from scratch, it is hard to catch up.
Cav never did.
Someone like Fuchs, who has shown he can identify players with raw potential and develop them into serviceable players, is intriguing. At this point, it should be clear to everyone we are not going to be bringing in OL each class that are finished products ready to go. If we are to have a good solid OL, we will need to develop players over time. Gotta have coaches who excel at development. That and identifying players with a lot of potential.
Can Mattox develop players and turn middling prospects into accomplished starting players? Not sure. I know UTSA improved a lot on offense once he came on board. His OLs have played a big role in a lot of offenses that scored a lot of points over the past decade.