A good manager would sit him for a few games and ask him if he wants to be in the major leagues. He's a talented guy, but the mental mistakes are just ridiculous.
A manager trying to keep his job probably wouldn't.
It will be interesting to see if Molitor changes his ways now that the FO has thrown up the white flag. Will he sacrifice player development in order to try to squeeze out an extra win? Those are the kinds of things the FO will notice as well.