Morphs, of course, are another matter entirely. I think the unimesh figures have the best African morphs available, particularly the International Beauties package. The problem is that the other head morphs really need to be re-done to work with an ethnic morph. All the expression morphs, etc. This is not just a unimesh problem; it applies to all Poser figures. Morph the head too much, and the other head morphs won't work well.

IMO, this is a niche wide open for someone. I would pay for head morph packs designed to work with the DAZ ethnic morphs. So you could give more individuality to the faces, and give them expressions without the weird and unnatural results you now get. The unimesh figures are ideal for this, because you could load only the morphs you need.