From what I have read,Uk had no designated qb coach during the 1997 to 1999 period.The job was split between leach, mumme, and Franklin. They all studied the same offense schemes from byu and similar style programs. He even has a book about it. The qb coaching was shared best I understand, as all three were integral in designing the attack, for which Franklin has been credited for developing a significant portion. I have read 6-7 different sites giving him credit in tutoring couch and others during the period. As you stated he also has had a clinic teaching school programs and individual qb's the scheme throughout his tenure.
To think he played no part in tutoring the qb's is simply short sited even if he did not, nor anyone else I can find, had that specific job title.
The air raid attack was coached by committee that had been studying it together for years. The passing and offensive numbers actually went up after couch left, and Franklin officially took over... Think about that!