If they aren't getting rid of PFZ's, and Royal Joke can't get them to change 1102, then its not likely that the colleges will be stopped from subverting Michigan law, and the constitution either.
Technically they are not subverting the Constitution. At least not the MI Constitution. But only technically.
OP, do you go to U of M? I do and have had to deal with this for some time now.
We would need a lawsuit or Constitutional Amendment at this point. It would be "easier" to get the Regents to change their laws but fat chance with that.
A simple statute would not do because the University would simply keep enforcing the ordinance, arrest the first carrier they found, and head for a test case while a poor chap loses his guns and right to carry and has to deal with the legal fees of the process. There is already case law that makes UM a special entity. Then the University might win their suit and it would all be for naught. Remember, this is a Constitutional issue. A simple lawsuit just has too much case law against us that grants UM special consideration. Would be too high a risk. I would rather pick at the low hanging fruits such as the fact that the ordinance is way too broad (can't drive through Ann Arbor without being on UM property and thus being illegal, this is not the most narrow regulation possible, etc etc) and start from there. First, not directly on campus. Then allow it on campus but not in classrooms, dorms, etc. Then allow in classrooms but not in dorms (not like anyone who lives in dorms can carry anyways). Etc etc.
Just bringing universities under pre-emption wouldn't do because there are tons of universities in MI and as I hinted at earlier, UM is one of the few special ones (I think there are five) given special consideration. UM would just argue they aren't covered under the new legislation and point to the previous case law saying they have already been pointed out to be special and thus immune from the legislation.
If the Constitution were amended to explicitly disallow UM from getting around pre-emption the possibility of UM resisting would be much much less given the case law around pre-emption.
I have toyed with the idea of a broader suit. The University receives federal funding, yet it infringes on what is now a fundamental right. Alas, this is a pipe dream. The issue must be decided at the State level.
But before all of that we need a much different kind of change, a cultural one. Politicians must get elected again, as must Supreme Court justices and District Attorneys. All of them would be willing to "fight for the safety of the people of Ann Arbor and the students at UM from the threat of violence blablabla".
It's a tough one