Transform 3D Multipatch Shapefile into 2.5D Shapefile

I would like to transform a 3D multipatch SHP into a 2.5D SHP whereby the attributes for the 2.5D file are the calculated elevation and slope characteristics from the multipatch.

 

 

I have tried using the 2DForcer transformer and the BoundsExtractor calculator, which allowed me to hook the maxz up to the BLDG_HEIGHT attribute.  I had some limited success with this configuration.  However, it would seem things come across at strange scales, there are of course no slopes, and in general the it looks like the resulting buildings are just smashed together faces.

 

 

Does anyone have any guidance or workflows that you can share to transform 3D multipatch SHP into 2.5D SHP?

 

 

Thanks!