Since the problem affects the Monarch, personally, and positionally, there is a need to discuss it with other nations that would be affected, so that a positive solution could be reached.  Unilateral action would perhaps get backs up unneccesarily, especially since the future is secured for the next couple of crown-hand-ons.  It's a good time to get discussions going, get legislation through, and there should be time for even the slowest to get their finger out by the time Williams daughter comes to the throne.  Remmeber that while Elizabeth can be Governor of the Church of England she can't have a female Archbishop, so perhaps other laws should have a bit of a push too.