It's a win/win for Shammy, assuming he is out the door.
I'm sure he wants Cousins to do very well. We all should.
That way, if he does land another job, he might be the guy willing to trade for Cousins, as he already knows his system, and has a couple years of his tutelage under his belt.
And if not, he walks out the door leaving a full blown QB controversy in his wake, for Snyder & Co. to deal with.