What I am saying is not that different than what you are saying. We are less than two years away from a top transfer telling a program that he will come if the program replaces the coach.
Imagine what happens if an agent calls a .500 school and says that if the school hires his coach, he will deliver 10 transfers. How quickly is the incumbent fired?
I think that stuff already happens, though. No program fires its coach these days without getting a thorough appraisal of who's likely to stay or leave first. Texas A&M, for instance, wanted to get rid of Jimbo but keep as many of his players as possible - so it decided to hire the guy who recruited a lot of those players in Mike Elko.
So to your point, yes, the demands of players and agents are likely to get more explicit and public as their perceived power grows. But the coaches dealing with those ultimatums will continue to be the ones who were on shaky footing to begin with.