Shanahan's story, to me anyways, told a story of Shanahan getting impatient, reading into things too much, and making a hasty decision. No reason for him not to continue to be patient for a few more weeks, let Dubas absorb the season and the playoff exit, and then give him a chance to come back with HIS answer. Not the one Shanahan thought he'd get from him by playing mind-reader. I don't get the urgency in making this decision.
Also, I don't think that Dubas has done anything to deserve the assumption that he would somehow commit to coming back and no be 100% committed like he's always been.
Then again I'm sure there's more that happened that Shanahan didn't mention at the presser, even though he said way too much as it is IMO