The prudent thing to do, especially because of the cap hit, is to see with your own eyes how he responds to your coaching. Anything else is folly IMO...(in case you think I'm enamored with EJ I'd suggest you dig up some threads from last off season),
to say it publically you are correct...privately is another matter. Like why would a NFL GM/scout/HC ever trust a coach who steered them wrong on a player?