2) Can Graphmapper work with besie curves with more than 2 nods? Or to import-connect curves from Rhino (it is quite hard for computer to work with hand-made analog of graphmapper based on rhino-curve/
No. Equisistance makes a shape of points on equal distance from chosen geometry (for example, sphere for a point)
You can look at it here: http://sawapan.eu/
in "other softwhare"
other their works are also very impressive
Making metaballs in 3D is not that difficult. It's just a lot of coding. I've already written 2D metaball algorithms for Grasshopper, and I've written a (slow) 3D metaball solver in the past (see image).
But the output of metaballs is almost always a Mesh. Is that going to be useful?
Ok, maybe you right about metaballs.
Also maybe markov chain will be more useful if aech variant will be supported with hotkeys, for example 1,2,3,4 etc