The newer Michigan regulations are clear as mud. I had posted in a similar thread a few years back that the 2018 Hunting Guide used this exact verbiage:
Direct from the 2018 Guide:
"Deer Carcass Disposal
Dumping of deer carcasses or other wild animals is unlawful, can spread disease,
and may result in a ticket. Hunters who process their deer should properly
dispose of all parts. The hide, brain, spinal cord, eyes, spleen, tonsils, bones, and
head should be disposed of in an approved landfill. "
I don't find any reference as to carcass disposal in the new guide except as pertains to moving carcasses with respect to CWD core areas. I also checked the actual Wildlife Conservation Orders and didn't find any reference in there. I highly doubt that means it would be considered legal to go dump a carcass on public land though.