Tip for the future: breakdown the issues at hand regarding Michigan Prop 2 and 3.
Prop 2 would enshrine collective bargaining as a right in the Michigan Constitution. That part, while not ideal, isn't particularly problematic (other than the effective ban on a potential right to work law) as there's no effort to repeal collective bargaining. The problem is that the proposal goes beyond that -- it would also bar the state from intervening on any issue that potentially could be subject to collective bargaining.
That would ex post facto repeal numerous laws on health care cost sharing, school safety, and so forth, and would repeal significant reforms put into place over the past few years (some of which even were enacted under Democratic Governor Granholm). The cost could be huge, in the hundreds of millions if not more.
Prop 3 would mandate 25% of energy be from renewables (up from 10% per state statute). That would increase costs, especially for business.
The other problem is that both of these are constitutional amendments, so if there are problems with them, there's no way to change them without another referendum. It's much easier to amend a statute.