I voted yes, and I would predict it will make a huge difference. Sure, point rules don't promise 1 1/2 year olds survival. I took a 1 1/2 year old in Wyoming that had was a 5x7 (white-tailed deer). It will help bucks reach maturity. We've practiced point restrictions on our property since 1998, and it's paid off. On about 180 acres in NLP we've taken around 20 bucks that were 2 1/2 or older, most scored around 100 inches. Not monsters, but nice bucks. Prior to that we shot the first buck we saw, and took only 4 bucks that were respectable in 12 years. We typically find about three or four shed from yearlings each spring.
Not many guys would pass up a healthy 2 1/2 year old in Michigan, and many would probably mount it. I disagree with the idea of the "Michigan Trophy", I think any county in Michigan could produce 150-160 inch bucks. It is a matter of age, we just don't have many 5 1/2 year old bucks out there.