According to the story, Mr Morin’s financial adviser asked him several times if he wanted to be more specific about the bequest and he always decided not to be. According to this:
it appears that Mr Morin may have specified $100k for the library and left the rest unrestricted.
So, I’m not sure one can really say that the use of the money went against his wishes. His expressed wishes were that the university should be able to use (most of) the money as they saw fit.
Trying to justify using lots of it for a new scoreboard by saying that it is what Mr Morin would have wanted because he discovered some deep love for football is a complete dick move, yes.
But only because it indicates that the administration knew that the decision was dubious and needed something sentimental to try and justify it rather than being confident they could justify it on its merits.
There are lots of good reasons not to restrict gifts. It does rely on trusting that the people you leave it to will do something you approve of with it or simply letting go and not caring what they do with it.
Either way, if you don’t trust them, probably better not to leave them money at all.