A pipe dream I have is Chicago-Minneapolis-Pierre-Rapid City-Cheyenne-Ogden-Salt Lake City-Emeryville train. Would restore service to both of the 48 contiguous states without Amtrak.
I don't know the exact schedule, this is just an idea that I have to improve the national network. If this is a big problem for some reason than a second Lake Shore Limited servicing Ohio in the daytime would be a good idea.
As you know, Ohio should get a daytime train. Cleveland has two trains, but both stop in the middle of the night. The Lake Shore limited should be retimed to give Cleveland a daytime train, as most of the route is served by other trains.