The only major change I could see the head coach making is having KOK "retire" and then going out to hire a QB coach/passing game coordinator/co-OC.
Should that move happen, I will throw Rod Carey out as a possible hire, especially if it could be pitched to Carey as an opportunity to compete as Ferentz's successor. IIRC, Copeland coaches under him at NIU.
Next year's schedule is just brutal (even @Rutgers won't be a layup), but in theory both lines should be better. The d line in particular has a chance to be really good and go 10+ people deep if Jones, Hurkett, and Graves can contribute behind Evans, Shannon, Lee, Van Ness, Black, Waggoner, and Craig.