Actually, creating morphs can be quite simple (or difficult) depending on the software tools at your disposal. I use Rhinocerous and it's "Flow Along Curve" feature makes short work of even the most difficult morphs (Rhino 4's flow along curve screws up morphs for whatever reason, but I still have Rhino 2 and it does quite well as does Rhino 3). There is still some tweaking to do later, but that feature will always get you close to where you need to be. I have created hand sculpted characters in the past and always used Rhino to create my morphs ;o)

Quote - Good morphs for various body type can take a long time to make. Each morph can take almost the same amount of time to model a new piece (before UV mapping and texturing), so at some point content creator must draw a line how many morphs to include, as at some point they could never recover the time investment in dollars.

This is one of the biggest reasons for limited amount of morphs in many products, you can't always make enough money on the product to make it worth while including large number of morphs. Even with top selling pieces.

As far as I know, GND is hand sculpted, and not s dial-spin character.