I understand and sympathize with tebop's frustration, but also realize that unless you're willing to fork over a price for a more complex Poser in the range of 3DS Max ( which I did and regret ) and is so process intensive that it forces a state of the art home pc to labor at a snail's pace, we'll have to find some work arounds to solve these issues.

One solution that comes readily to mind ( besides post-work ) might be DAZ's creation of figures pre-modeled in various kneeling, limb flexing and sitting positions that can then be adjusted into a wider range of  poses that will eliminate polygon shear/warping. Alternatively, they might offer "limb kits" that allow for the replacement of standard figure legs, arms and pelvises that can be integrated into a modified figure with a couple of mouse clicks, using the same process Poser has always offered. Just a thought.