My post was to consider and get input if fans think NU should consider a more progressive re-alignment of offensive coaching staff rather than simply replacing McCall with a new OC/QB coach.
Looking at current B1G coaching staffs I disagree that it is "common" to have a single coach fully responsible for both OC and QB group.
See below where B1G teams are sorted by offensive performance in 2019. I did this quick so can't guarantee 100% accuracy.
Of the teams in the top half of performance none had a coach fully responsible for offensive coordination and quarterbacks.
The two teams that most closely align to NU's current coaching structure are Lollinois and Butgers.
Further looking at top 4 BCS teams Clemson has co-offensive coordinators for pass and run, LSU has an OC and a Passing Game Coordinator, Georgia has PGC and RGC's.
It will be interesting to see what Fitz does. Cheers!