Rather than the expected clip brush-like behavior… when I use the trimcurve brush with BRadius option enabled for example I am left only with a strip of geometry as wide as my brush. If trim brushes are supposed to behave like clip brushes in this respect… it would be cool if the BRadius option created two new slices and polygroups/sections of geometry where the abrupt angle change occurs. Oh, I also think it would be better if the BRadius Trimming axis was calculated based on the average of the diretction and center of the trimmed geometry as opposed to nearest X,Y or Z axis which is how it seemto currently behave with the clip brushes. 
I much prefer the clean lines with new geometry creation as opposed to the geometry squishing the clip brushes use. So thanks for that
If for some odd reason this behavior is only happening with me… please let me know
I suppose this could be the intended benhavior? I was expecting it to be similar to the clip brushes…