Short-sighted.
I mean, crazy short-sighted.
There was tangible growth seen in just these three games in different aspects of his game. He's simply too young and inexperienced for the front office to be quite so judgmental that he's exhausted his ceiling. Definitely not.
Fans? Fans will do what fans do. Be fickle.
The front office and the coaching staff will continue to develop him, and he's not a lock certainly... certainly... but he absolutely has a chance to be a starting caliber NFL QB in the next two years.