I took #352 in business class on Saturday. The Wolverine is doing one round trip a day, leaving Pontiac at 5:12 a.m. and arriving in Chicago at 10:32 a.m. Then leaving Chicago at 12:55 p.m. and arriving back in Pontiac at 8:39 p.m. The train makes all the Michigan stops but bypasses the Indiana stops.
It did seem like the car had been cleaned in Chicago. There are only 18 seats in the car; it might have been half full from Chicago to Ann Arbor. Everyone complied with the mask policy. By the time I got out in Troy, I was the only one left in the car. Walking through the coaches for the fresh air stop in Battle Creek, I didn't see many empty pairs of seats. Seats were comfortable and the cafe attendant provided good service. There are some really nice-looking stations along the route, especially in Niles.
Generally I've been happy with the social distancing in coach on the Capitol Limited and Lake Shore Limited, but I think business class is better on these regional trains that have less seat pitch in the coaches. Since I was traveling during Labor Day weekend, I think either coach or business class would be a lot emptier in a few weeks than what I experienced.