This works if you have a team with talent that is not achieving.
This doesn't work when you have a bunch of players in a system they were not drafted for, another bunch of street players who are only on the team because it has no depth, and all of them playing for a head coach with no power and a GM/Owner who cares more about the 'entertainment.'
I guarantee you that you could bring Troy Aikman in his prime on to this team and the defense would still be giving up record yardage totals. Why would they care what Troy has to say? Jerry is the ringmaster of this circus and he signs the checks. Nobody else is worth listening to.