well I dont know these details
The new chromosone has not been yet injected in the cell so it is not yet proved that it can reproduce itself and that it can perform the task for what has been created
However scientists dont doubt that it is just a matter of time
we will see.
If the new artificial micro organism should also be able to evolve, by itself,in a more sophisticated micro organism, suitable , for example, to survive in a tougher enviromental condition than it would be hard, in my opinion, to claim that a creator is really needed