Quote - It could have been avoided very simply if the lower stomach area had been named "waist" and the pelvis area had been named "hip"

No it couldn't! the 'hip' has a rather special place in Poser tradition, as the contiguous descendant of BODY. And whilst it in not written on a stone tablet that it must be so, to flout this convention would seem sheer lunacy! Naming the pelvis hip, and making the 'waist' the contiguous descendant of BODY, with hip as a descendant of 'waist', would be at the very least, seem extremely odd and unconventional. 

Quote - Previously there have been other figures where the creator has not understood the implications of deviating from Poser standards.

There is great virtue in adhering to standards, on the other hand, something can not be completely new, and standard at the same time. The standard for actor names and hierarchy is defined in the "StdHierarchy.txt" that ships with all Poser versions.

There is a long tradition with Poser figures, of adding none standard actors and hierarchies. Antonia (hip2), V4(lEye rEye, bodyMorphs) V3(buttocks), V2 (upNeck, buttocks), and Jessi(a heap of toes), all added none standard actors. So in a sense it is standard procedure, to add none standard actors.