Most aussies were calling for changes before the tests even started no one was performing in any of the lead up games with the bat except M Hussey and Gillespie was struggling back then aswell.
The reason Aussies were doing so well before was if they failed too many times in a row they would be dropped (except ponting,hayden an langer)for someone else so they made every innings count.
Now it seems no matter how crap there going there place in the team is secure so they dont need to worry about having poor performances in a row and being replaced.
Some would say thats a good thing because its less pressure and one less thing to worry about but its obviously not working and they performed better when there place in the team rested on every match.