I love to use the curtain wall feature in archicad, but as a newer user i feel they are hard to work with and there isnt much room for creativity. I would love if they were not only easier to use but have more ways to build them.
As a general wish I would say that improvements to the curtain wall tool are essential. While it is a great tool to have it was developed and released to what I consider "good enough" quality. Improvements that would be good are:
1. Greater flexibility in creation and editing of complex forms. It would be nice to have the compound curves we keep seeing in every Revit splash screen and promo.
2. Edit in plan.
3. Ability to select custom panels and change settings without having to first select the curtain wall and go into 3D edit mode.