Mayhew and everyone down the ladder is on thin ice. Upper management was greatly disappointed when Mayhew and Lewand promised to deliver Suh then failed. They went into this season on thin ice.
The ice is already cracked. The reason he will be gone most likely is a new GM means new coach. That's a fans perspective. Ford Jr retains Mayhew and Caldwell stays also with a new OC.
This is the off season that will tell us Lion fans whether he is like his old man or not.