Interesting overall but you clearly misunderstand AutoDesk's use of the word "vertical" (which has nothing to do with "vertex").
A vertical product is simply one which is built on a foundation which is AutoCAD.
AutoCAD is a general-purpose programme; the vertical products use the tools in it and build additional tools on top.
AutoCAD is still based on its original design concept from 30 years ago and, despite one complete rewrite (but not redesign) and many releases featuring additional tools, it will never be able to do many of the things that are basic to Revit and Inventor which come from completely separate code bases.
So, decide what you need to do and pick the appropriate software; we are not yet in a position to pick and mix features from different products.