>>9070836Alba has a completely different hair style and colour, so that can't work unlike many of the other Golds.
The proportions of the Myth Cloth aren't really a problem, it's not like they were ever accurate to the proportions of even the original anime either way due to toy restraints like the anorexic waists + inconsistency. Just giving them proper heads and adjusting the Cloth for minor details should be enough.
Not like we can expect Bandai to give us an update on the Gold Saint molds that are nearing ten years old at this point.