Major economic changes are on their way. Europe is broken, China data is unreliable, Japan is desperate to maintain competitiveness, and the US is waging currency wars... and Australia? Keeps trucking along?
If you believe that a slowdown is inevitable, pay down debt as soon as possible. If you believe the boom will go on, reduce debt because interest rates are going up. Regardless it's always a good time to refinance, especially when interest rates are record low!