This location is totally unacceptable. With the park areas and the construction of the sports stadiums and a major museum in that area, a station would be inconvenient to access. Station related parking at the station? I think that would be impossible to do. Lots of parking options near the stadiums, but would not be convenient to use. Plus, street traffic in the area--particularly if one is not familiar with the area--can be

!
Using Cincinnati Union Terminal (Center) is the best option. There is a large parking area at the station that is not available (the last I checked) for long term Amtrak customers. Maybe that could be changed? Maybe a parking garage might be constructed by the City?
Columbus Union Station did not have an elevator or escalators. Dayton's Union Station did not either as I recall. Columbus: the tracks/platform were under the building. Dayton: the tracks/platform were elevated to a second level with the station itself at street level.
At least for Dayton, constructing a station at street level could still be done with ADA access to the platforms--which might still exist, don't know for certain--above the station.
Amtrak had a very small building somewhere in the "yards" away from where the Convention Center was, but was in the downtown area.