PLEASE provide Toposolid the features of Slope and Offset.
When site grading, we have a start point for cut/fill, and a slope standard as either a Run-Rise ratio or Percentage (provide both options, please). We don't know what the end elevations will be, and sometimes don't care. We care about the Slope of the cut/fill and the distance it will go. Those elevations at the edge of the new grading will be whatever they will be. The intersection of existing grade and new cut/fill will vary and not be a consistent straight line. The end elevation cannot be calc'd across a varying ground surface.
Roofs have a slope arrow function. Ramps are made with slopes. Add the same feature to Toposolids. And while you're at it, add Slope to Floors as well.
Also, add an Offset feature to start the slope at. When grading around a path (driveway, walkway, road, etc), for example, there may be a shoulder to from where the new grade starts, either cut or fill. Or excavating existing topo for a new foundation there may be an offset from the base of the new building footing and a layback for the excavation. Offsets for grading can be from a line - including Splines - such as along the face of a building, or a geometry such a path, parking area, etc.
There are so many real-world scenarios where Slope and Offset for Toposolid would be extremely useful. And actually make Toposolid functional and useful. I've listed just a couple that come to mind in my own work.
Afterthought: writing this suggestion, I find it baffling that Autodesk hasn't already included Slope as a feature of Toposolid. But given how poorly developed Revit's topo tools have historically been, I shouldn't been surprised.
