Just thought I'd post this up in case it was useful to anyone. Here's an HDA, that wraps up a technique used in the new muscle object which uses biharmonic capturing to drive a point deform SOP.
There's an example file here too which just uses a very contrived example to show how it may be able it improve a standard point deform.
I was originally going to do a quick tutorial video on the technique, but I thought that pulling apart the asset would probably be more helpful

Cheers!
Henry