Well, one way to tell about Clark is to see what type of offers he receives. If he is getting offers from mid-major programs, that tells us one thing. On the other hand, if he is getting offers from G5 programs or even P5 programs, then that suggests that other people see more potential in him.
all depends on what he wants. does he want to go to an FCS school and start, or compete for the position at an FBS school?
On Fleck, I'm no mind-reader. But it certainly appears that once you are a starter, you don't lose your position until you are physically unable to play. Annexstad seems to be the exception to that. But - let's not forget, Morgan committed to Fleck when he was at WMU. Morgan flipped to MN to follow Fleck. there is a bond there that other coaches and QB's may not have. (cough, cough, Kirk Cousins, cough)