MEB,
What I saw on the specs mostly was that it opened .AI files (especially needed if you no longer have Illustrator), and exported into all of the standard "vector" formats out there. The program is good, but it lacks an ability to interact with the industrialized world, where basic CAD files exist. I've been using commercial vector drawing programs for over 30+ years. Even back then, they all had the ability to import .dxf/.dwg. This is not new, and can't be that hard to implement. In the industrial workflow space, precise, accurate drawings are made in CAD, and then transferred to vector illustration programs like Designer (mostly Illustrator or Corel Draw) for artistic enhancement everyday. Whether that be straight artwork creation on top of a drawing or die line, or just simple coloration treatments.
If you want this product to succeed, it must at least be able to do this. The applications and sales potential for your program that can do .dxf/.dwg file interchange, far outweigh any "purely artistic" oriented need. There are thousands of users out there that feel abandoned by Illustrator, only to be stuck with them because of Designer's inability to match that simple capability. I know I'm not alone. I don't want my money back. I want you to see the potential to make your good product great, and unlock it's full potential.