Hi Gregg,
You can, and should, still use DataCAD's features with symbols, just don't worry about doing it to the BIM requirements. All you really need is to have your saved 3D objects display as a 2D symbol when in plan and the 3D object in 3D. If you're okay with the generic smart doors and windows (customised from the tabs rather than with symbols), then you will still get plenty of productivity gains using the smart walls as they are quicker than drawing, offsetting and trimming 2D lines and you and your client's get to see what you're designing too