"Replacing the dollar with an artificial currency would solve some of the problems related to the potential of countries running large deficits and would help stability," said Detlef Kotte, one of the report's authors. "But you will also need a system of managed exchange rates. Countries should keep real exchange rates [adjusted for inflation] stable. Central banks would have to intervene and if not they would have to be told to do so by a multilateral institution such as the International Monetary Fund."
All about control and stasis, that is what you get if you try and control all the exchange rates in the world, global stagnation and planners trying to outguess the market using an artificial currency.
Of course if they really wanted to replace the Dollar as the global reserve currency there is one alternative that is tried and tested and waiting in the wings - gold. But it isn't artificial and it isn't controllable by a bunch of second raters from the UN.