I reckon the reason for the delays are the fact that there are no precedents for the regulators to follow regarding having a listed crypto currency exchange. There are likely to be complex legal issues involved and I suspect that we are on the back burner at the moment as we are a small fry in comparison to the banks who will be getting all their attention.
The thing that reassures me is the fact that the management must know that they have to make the exchange work or they will be in trouble with regulators, investors and their own friends and connections who have a lot of vested interests in the exchange. Desperation is a great motivator.