Do you think QGIS could interfer through a plugin and/or scripts to get advanced CAD features from FreeCAD?
FreeCAD could be used for 3D design as well. For example, I want to get a building and then georeference it inside QGIS is the way of SketchUp does.
So FreeCAD could be used to get 3D design inside QGIS.
I got a personal message as well about QAD, but it is more a LibreCAD at this stage and doesn't have the features of FreeCAD, but it is very good to replace the existing actual CAD tools available for QGIS.