Would you really ask a law school dropout how to run a law school? Sure, it would be worthwhile to ask what bothered him that he wanted to leave, but would you really care for his recommendations?
PBA: It depends on your goal. If your only goal is to graduate the best lawyers, then no, there is no reason to ask the dropouts. But if your goal is to make sure that everyone who enters the system graduates, then yes, you would want their suggestions so that you can move towards that goal.
If your goal is both, you may be “Nimtza Korachas M’Kan UM’Kan”.