,
Perhaps you misread my post, if you tried out what I wrote earlier you would know that you would be editing directly on the posed mesh and correcting it as you would be in any sculpting application or skinmorph setup, which is why I Snapshot the “pose” first and used it as morph for reference reasons before turing it off again for exactly this purpose otherwise I wouldn’t have suggested it as you would be working blindly.
I suggest you try it out before you assume it’s not the solution : ).