I don't understand how the plaintiff has a case here as there are no damages.
Subjectively, I get the impression that the lawsuit is performative and the donor is trying to pressure the endowment to engage in a more modern textbook passive investment strategy. I don’t blame him - I feel the wealth management industry acts as a parasite in many cases. This case sounds like a common arrangement for a university endowment, though, so I feel it would be hard to defeat with a lawsuit. But I bet the suit gets the university a bit of a break on those fees.