When referencing a DWG Revit does not see nested xclipped boundaries as a result a select few dwg's can not be used easily.
It would be nice to have this work but until then my workaround with AutoCAD 2017 is to publish the drawing as a pdf then create a new file and import the pdf using the new importpdf command to create a usable dwg. This way you get all your colors and layers. While it does introduce a small error it's better than having to manually clip all those reference drawings (100's) every time the architect sends us an update.