i hope that the actual modeling limitations in Archicad are going to be adressed soon:
Archicad is a well known BIM software as are Revit and Bentley Architecture ( with generative components ) each have its pros and cons ..but I think that in term of modeling, imporvements in archicad are really needed ('graphically' speaking & within archicad ) ..Bim softwares are also modeling softwares AFAIk ( ruled surf , nurbs,...etc ?!) _ not dumb nurbs or ruled surf _
I hope Graphisoft will address this because it seems to me that Arhicad has a lot of "hidden" potentials ....