McD's success should be used a springboard for both parties.
We have Allen to dangle in front of the best available talent and turn an OC into a head coach.
McD has the rejuvenated franchise and city of Buffalo to hang his hat on.
It shouldn't be that hard to shift gears at this point, except that we will need a new HC, DC, and OC all in one offseason. But we have Allen, Diggs, and a strong roster of talent.