Existing width is 30m so OK for A320, provided shoulders are sealed. Being hot and high length could be an issue in summer but at 2300m I would have thought this could be adequate.
There is some new work coming up at Karratha that is out to tender at the moment, and with Virgin now a serious player in the resources game and able to throw some 737's onto mining routes, perhaps it's time XR had a larger type.