AutoCAD Civil 3D :: Convert DWG To Simple 2D DWG

I would like to open discussion about function that could easilly convert Civil 3D drawing with its all corridors, grading groups, feature lines etc. to regular AutoCAD 2D drawing to be able to hatch, measure, trim and so on. Is it clear, that corridor edit commands and features are not good enough to add another structures as stairs, culverts, parking lots with green islands and another civil structures...

Export to AutoCAD or AEC Explode  converts drawing to some 2D/3D exploded hybrid, where it takes hours of editing, flatting and joining lines to make graphically correct and usable 2D drawing. And what worse, when the design is changed, user has to start from scratch again and again, which is not twice effective... And it is just directly against all Autodesk marketing phrases how to work smarter using BIMs.