A critical feature for 2015 was the tool. While not perfect, a structural engineer could model in Revit, export the analytical model to ACD 2015, and then detail the rebar. Conversely, a detailer could send shop drawings back to Revit for coordination.
One of its greatest strengths was its integration with the broader Autodesk ecosystem. It maintained a bi-directional link Autodesk Robot Structural Analysis