Thank you very much Pilou and BurrMan. I think I fiiiiiiinally get it. I was thinking there was a MoI Proportional Editing equivalent that was just around the corner and that I just couldn't figure out, but the reality is a whole lot closer to what I had already been using MoI for anyway. It was just the terminology that was bamboozling me.

I've been ping-ponging my models out of MoI into Blender then into Nomad then back into Blender and that's been getting me close to a finished product I can be happy with. (see attached pic for a 90% complete model I'm currently working on) If I was totally proficient, I'm sure I would do it all in Blender but I still hate that garbled interface! :D