Many people are either tired or completely baffled by Second Life's needlessly overcomplex avatar customisation system, which may dissuade the new or less experienced user from investing their time in Second Life.
Instead, why not create a modern "System Body Shape v2.0" which has a vastly higher triangle count than the original System Body Shape, which might give higher detail and quality avatars? And do it without having to wear an additional laggy outer mesh body (and head) over a System Body shape?
"System Body v2.0" should be editable with the same (or improved) "Appearances" sliders to make a truly unique body (and head) shape that makes wearing mesh bodies (and heads) either unnecessary, or a secondary option.
As well as a "System Body Shape v2.0", the shape should have a universal rigged mesh clothing, footwear and hair standard.
"System Body Shape v2.0" should be able to wear the original SLUV mapped skin, but could also use it's own newer skin which has asymmetrical arm texturing!
Lastly, "System Body Shape v2.0" should NOT replace the original System Body Shape (v1.0?), which should be retained and maintained for continuity.