Hi again,
You have to keep in mind that Cinema is a polygon based modeler and Vectorworks is a NURBS based modeler. You will find that moving your Cinema models into VW beyond frustrating. They will only import as generic meshes which are heavy and will bog VW to a grinding halt. Altering those models within VW is almost impossible. Sorry for more bad news.
The general workflow is to model in VW - use that model for your drafting plates and move it to Cinema for texturing, lighting and camera work. VW moves models into C4D pretty well - it still triangulates a lot of stuff, but it works. Going the other way is a nightmare. Modeling in VW is a totally different game then Polygonal box or hard surface modeling in Cinema. VW was a 2D CAD program for a long time and then added 3D. Cinema is a 3D DCC app that can import Cad data. Apples and Oranges. I'm not saying it's perfect - far from, but I haven't found a better combo for drafting plates and getting good renders from the same model (without going to Autodesk (see below).
Agreed on AutoCAD. My frustration with VWs direction has made me re-evaluate AutoCAD recently and....no way.