It doesn't matter. It can be the best law in the world. The problem is that in our secular Europe the law must be equal for everyone. That's our value systems. Juridic particularism is medieval and backward.
It is very unjust to apply a kind of law only to one category of people.
It's like I invented a law by writing a civil code, and then I imposed the UK government to create civil courts that apply this law.
So in your Europe the law is equal for everyone, treats the rich and the poor equally??? treats Muslims and members of the royal family equally??? Sounds like paradise, no wonder so many people want to move there!!!