I voted Trescothic, they fear he may get injured and force England to bring in a player who uses his feet and doesn't waft outside the off stump...

Otherwise I doubt that fear is in the makeup of the Aussie squad, if you want batsmen they respect then Butcher and Vaughan would rate highly, they have done it before, Thorpe also to some extent. With the Aussie jury out on Strauss until they see him first hand.