If the shader is the concern for the character in terms of labor just create a material collection file from that shader and apply it to a new copy of the character. Be alot easier than trying to track down the morph issue. Have you tried creating a morph pose from those existing dials and applying it to a new v4 with those packs (whatever) loaded? The pose will just apply dial values to pre existing morphs, maybe it will resolve the morph corruption/conflict that's been propagated to the scene or .cr2.

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