A little more convenience with the construction of the surface
Teach Revit to edit face triangulation surfaces and use 3D lines and triangles. Then we can make a good master plan. The example shows a fragment with a side stone. The edges were wrong. And it can't be fixed with Revit tools. Although it is enough to add a 3D guide line or rearrange the direction of the triangulation face.
Unfortunately, importing from an XML file using site designer doesn't help either. Revit spoils of 3D triangles.