Michael Hussey has lost it?

Michael Hussey had a brilliant start to his test career but now since the end of the 06/07 Ashes series Hussey has only been averaging about 37. Is it time for Hussey to be given the boot and open the gate for Phil Hughes whos droping was very unfair. Should Hussey be droped and who should replace him? Clarke moved to 4, Watson to 6 or 7 and Hughes to open the batting with Simon Katich?