Here's the deal.

Import V4 or the La Femme mesh into the scene from Geometries as static obj.

Welded, one mesh. With groups.

Export that obj back out as an obj with include existing groups.

One mesh again.

Now, load V4 or LF into the scene from the library as a cr2.

Export V4 or LF out as an obj now for morphing. You'll need to include existing groups in order to have the actor groups for FBM.

Guess what you end up with? An unwelded mesh. Unusable for morphing in an external app because of the splits in the mesh at the group boundaries. GoZ and various scripts act as translators to circumvent this. There's also a tedious way around this by importing the figure mesh from geometries as a prop (grouped) and using an ungrouped version to morph externally, loading that resulting alteration as a morph target onto the static grouped version and spawning props from the relevant effected body parts and applying again as FBM. Grouped props are not unwelded, Grouped figures are.

Full Unimesh Support seeks to eliminate all of this, amongst other problems. We're not getting it as was stated. Yet.