Small update: This was posted in another thread...
The "Keep Original Avatar" option under InstaLOD gives you the blendshapes except for the one "Mouth Open as Morph" which you are wanting.
There is a way to get by with just Game Base without the need for LOD's. The Game Base head is 2000 vertices, the rest of the body adds another 5000. I've experienced more than a few wildly successful clothing Polygon Reductions in the >95% range. With the "Delete Hidden Mesh" export option combined with low-poly clothing covering most of the body, I think a (hairless) Game Base character near 5K verts is possible (realistically more like 7K), plus you'd cut the overhead from the LOD distance checks.
CC3 & Daz Tricks | CC3 to Unity workflow
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