I was thinking, if you ever decided to finish this (and by that I mean your to do list. I know this is rather dated so I dunno how active you are on it), you should consider recycling the body to make a "Generic custom cartoon model" as a separate SFM submission which I think will be very popular on account of flexibility. And as far as I'm aware, not yet done on SFM workshop.

This model already has flexes for various body shapes which makes it diverse. If you swap the head for a (smaller) standard rounded humanoid head with various flexes for head-shapes, eye-shapes, mouth-flexes and so on, that and a separate pack for wigs and clothes I think would be very useful for SFMers who want to make generic/toon-like human OCs without the know-how or hassle to make theirs themselves in Blender from scratch.
The face features wouldn't have to be that anatomically accurate. Think Jaiden Animations or Shen Comix as examples of characters in mind.

While the default can be white, as long as you provide some texture templates for such a model, you won't even need to properly texture it. Anyone who knows how to use $basetexture on SFM will re-texture them anyway. Templates would be useful guides for it.

Just make sure if you do make clothing and wigs that they respond to the same flexes as the model so that it be easier to align the wearables better.