but would they want to push the boundary's further as time pass's and would then have our courts full of people saying they did not like the out-come, and who would fund it, how could we reverse a court decision and who is the judge whats his credentials & qualification, what about sharing out the cash in divorce case's
Sharing out the cash is divorce cases is pretty much what this would be used for (as exists already for Jews) - Any civil case can be resolved by a mutually agreed authority, and that is kind of what is being proposed here.
I wouldn't worry too much about the slogger-scenario of Sharia law being used for criminal cases. If it can't be made to fly in Pakistan, I doubt it can be made to fly here...