... and after another longish session with this method (above) I would say it is good but not a panacea.
++It produces nice results on about 50% of the waveforms I feed it. It works best on saws and saw like things. On triangles and folded sines you end up hearing a kind of "swooshing noise" that is not so great. The more buckwild the waveform, the less likely it works with this technique so far.
++comparing this to my VSTs that do unison/stack/detune/spread like Serum and Icarus2, the VSTs get a more consistent result with various waveforms.
Net net, I currently think I'm getting a solid unison/stack/detune/spread result from modular using WS+Minsk, but i) the effect requires significant "dial in" efforts and ii) it doesn't work great on every type of waveform I'm throwing at it.