I’m using the AddDirectShape.ByGeometry component in grasshopper to translate geometry from Rhino to Revit. When I modify the geometry in Rhino it creates new geometry in Revit, and leaves the old geometry in place. In the past I use plugins like Lyrebird, Hummingbird etc. which did a decent job at updating existing geometry rather than fully replacing, or creating new geometry.
Full replacing would be one step in the right direction, but modifying the geometry while retaining tags, dimensions, etc would be even better.
Rhino inside is amazing, the potential is incredible! Keep up the great work everyone!