In before a thousand individual itch scratches which prioritize v4 compatibility to the point of nerfing the figure.

• The fig ought to leverage current Poser's rigging capabilities to the max. Sophisticated weight mapping at the least.
• It should avoid bizarre geometrical subdivisions. No, you are not smarter than everyone else.
• The fig needs to be sculpted by someone professional whose understanding of anatomy is not intermediate level. 
• The dials that Morphs++ brought to V4 should have been sold with it because they are necessary for most of our applications. That should be a baseline for a new figure instead of expecting people to buy it as though a choice were involved.
• No hideous grins. Stop that. 
• Upon release, a bundle that includes basic contemporary clothing (dress shirt, dress, pants, skirt, bra/panties, catsuit), a few texture maps and shoes THAT AREN'T HIGH HEELS FOR PETE'S SAKE, a magnet or pose for fitting existing hair sets to this new fig. A secondary AT RELEASE TIME ethnic package that has texture maps. 
• Stop using INJ poses to do everything just because you can. MAT exists and we're not catering to programs that don't support it.
• A sane UV mapping scheme but that ought to be obvious. 
• The tear material in v4 does something nothing else can. Steal that idea and don't try to rethink it because I guarantee your better idea isn't.
• Nothing on the figure itself as a conforming prop that aren't genitals. 
• Nostrils that truly make glow impossible unless Cycles somehow fixes that. 
• Overlay textures for a few closeup areas like brows and nipples that come in at cropped higher res scales and are positioned using UV settings with material nodes to blend them in. 
• A specular map that's really based off of sweat gland distribution and not just an exported highlight layer.
• Feet with jointed digits. Radical, I know.