Thanks for the response, appreciate it.
Really surprised that it had worked for you without any changes except for updating print in the processor node.
I have never managed to export PBCs without placing freeway_export.py into a location where python 3 could find it and updating its print statements with parentheses and finally fixing imports inside Freeway node to make them compatible with Python 3 (which kind of makes sense, since the original Houdini project was created for Python 2 and we are using Houdini built for Python 3).
Regarding the roofs - like for many others here, roofs for buildings that are not of a simple rectangular shape (aka arbitrary roofs) are not placed on top of the buildings (the meshes are there, but it seems that the corresponding point cloud is missing).
By the way, I have noticed yesterday, that roads are missing a bunch of lane lines, parking marks, manholes etc. (small decals). I also see that it happened to your city on your screenshots - only some lane markings are present on the roads.