Edmunts has great physicak skills, he's big, fast and strong., unfortunately he has poor football instincts..., or is it Frazier's scheme, or is it both?!
Another obvious difference was Kelly had a pretty solid offensive line protecting him back then. They had to be good, Kelly was pocket passer and not boot legging QB.
Give Allen a solid O line with a half decent running game and watch what happens despite where the D is right now!