Revit topography needs to be updated so it can manage vertical faces when topography is created from a linked DWG that has a TIN mesh.
Also, the fidelity of the topography boundaries is poor. When generating topo for a road and batter with tight bends that turn back on themselves from a linked DWG the topo tool is unable to accurately define the edge of the road / batter and will often infill the area between across the curve in the road, resulting in a lot of post processing of the topography.
