Everyone is missing the point about rail service. The station building doesn't need to be used for a station. It's old and outdated and now better suited for other uses. A new station could be built on top of the existing tracks, with a connection to the existing building which would consist of a retail/entertainment base with offices on top.

The reason why a station makes sense here, sometime in the future, is that the tracks lead to a tunnel to Canada. If there was ever a major wave of investment in highspeed rail, connecting Canada's largest population centers to the midwestern United States only makes sense.

As for commuter services, there really isn't an optimal place for a single central station in Detroit but I will concede that New Center is probably better positioned.