Like others have stated, those schools do offer great academics and the "prestige" of being D-I. That said, obviously, the good DII schools can and will beat them. I see your train of thought. Either good or bad, as we now know, the DII wins now count at the very least somewhat.
Some folks in the past, (i actually believe this), that states are members of a voluntary organization. Some states tried to leave, the others fought them and won. I think it will be hard for the elite schools to leave. Because at the end of the day, they need to small schools to some extent. I think they'll manage to leave if they want, or will manage to get their way for the most part.
Whats important to me is that schools like NDSU, Montana, Appy, Ga So., JMU,, etc, and as much as it breaks my heart, schools like UND manage to find themselves in the right division(2nd from the top, or top if completely necessary) to be successful.