The proposed station at the old locations of Terminal and Union stations good choice. It will need to be shoehorned into the present commercial development. There are 3 items IMO that are needed.
1. A loop, if possible, that will allow the Crescent and other future trains (both NS and CSX) to come in from the north and departure to the north. Otherwise, the present station WYE will need up grading (all 3 WYE legs are CSX).
2. The 2 NS main tracks and 2 CSX (NS west and CSX east) from the Gulch to the complicated Howell RR crossings need to be consolidated into 4 main tracks with a universal CP between Howell and new station to allow more flexibility. CSX freights south of the Gulch can take western track(s) (NS) avoiding the station.
3. A duck under at Howell for CSX so it can go under all NS has to be built to end the many times NS or CSX gets in each other's way. Also, CSX often interferes now with the Crescent. The duck under will give a CSX a grade that is flatter northbound. Future plans for any commuter service from the north means the duck under must be completed first.
Routes going thru proposed station location.
From the north
NS from Birmingham, Chattanooga, Knoxville, CLT, Inman yard.
CSX - Chattanooga, Knoxville, Athens / Hamlet, Tilford yard. North bounds going to Tilford or beyond often block Howell CP for NS and Crescent.
Georgia NE RR - Marietta / Canton future commuter.
Not all trains from north go thru proposed station area.
Routes from south CSX - BHM, Montgomery, Manchester, JAX, Fairburn intermodal.
NS - Macon/ JAX, 2nd route Macon / Savannah.
From east. CSX = August / CHS.