Although this does not answer an improvement in Rhino, but we have a plugin that allows Rhino, Grasshopper and Rhino.Inside.Revit to work with BIM360. It is one way to have a central set of files: Using BIM360 with Rhino and Grasshopper files
Although this does not answer an improvement in Rhino, but we have a plugin that allows Rhino, Grasshopper and Rhino.Inside.Revit to work with BIM360. It is one way to have a central set of files: Using BIM360 with Rhino and Grasshopper files