The only other option is to convert your character to Humanoid.
You'd loose DHS, skingen and ability to dress character in CC.
You should be able to save face profile, export character as FBX and re-import as Humanoid with CC_G3Character HIK profile.
Then restore saved face profile. I am not sure if you'd be able to work with GoZ at this point as I work with Blender pipeline.
But otherwise, if you work with Humanoid character externally, you should be able to preserve changes made to UV and skin weights (which are restricted for Standard characters)
and then re-import back to CC.