Hello Michael...few ideas for fast arch. modeling...
Have you maybe considered some optios for more easier archit. commands?
Like egsample instant drawing of vertical surfaces that could be defined as walls (you draw line that doesnt have to be extruded, its like it has immediatly its elevation), then maybe making holes for openings that doesnt have to be the usual way like in Rhino where you have to draw box then substrackt.
Also maybe to have a litlle parametrisation here available so when you have a hole 90x90 that you could easily transform it to 100x100 or 120x90...
Maybe also a profile libary available for instant drawing of window frames, where user can define its profile curve that would be sweeped along the edge of the openings, also possibility of saving its profile libary....Ideas keep pupming in:-)

Heres a small plugin for Lightwave that I saw in actions.
Its realy is a beautifull , unique and TURBO thing when it come for Arch modelling....
http://www.wtools3d.com/ (take a new features tour)
http://www.wtools3d.com/index.php?p=3&content=online_help
http://www.wtools3d.com/index.php?p=4&content=tutorials

If this could be in Moi, I think youll draw a lot of users to you.
I mean a lot!