Also here's the thing, I think we can agree that Marner is insecure, he has a hard time handling the pressure, especially when things go wrong. But .... there are a million reasons for him to stay.
I think what'll happen is Shanahan/Tre/Berube or whoever else will go hold his hand, tell him how much they love him and need him, and then he'll stay. He wants to feel loved, held, coddled etc., Dubas was so good at that, maybe they'll ask him for some tips.

I think deep down, playing here is still his dream, once he gets the positive reinforcement he craves, he'll sign.