As it is right now models whose eyes and mouth distance doesn’t match the same as TU models suffer the problem of accessories like the cigarettes not being aligned with the mouth, this can’t be fixed by better aligning the eyes metadata since the cigarette will always have an specific set distance between the eyes and the mouth position. The best solution to the problem would be to have the mouth metadata be its own thing.
Another suggestion that would improve the editing of metadata would be to be able to select more than just the default wearable in the editor (either have a global metadata, and be able to edit specific ones where need to, or just preview all of them and try to find the balance between all of them).