Hey Marius,
Thanks for the report!
The wall-by-face issue sounds like an easy one, we’ll look into it soon. Although being able to specify a mass face as the base one is a bit tricky, and we might not have a solution for it in the short term…
Would you see a benefit in being able to create these objects directly from Rhino instead of GH? We could see what’s possible as part of the mapping tool.