Have people forgotten that Katich bowls? And has had success in test cricket with the ball? He also has had success domestically. No use putting Hogg in, an average batsman and an average bowler. At least Symonds or Katich are average in one area, and Symonds is a much better fielder than the both of them.
Hayden to the middle order? I doubt it. Martyn to open? lol, first short ball he will be caught cutting. Don't try to fix what isn't broken, and the only things that are broken is Gillespie and the one batting spot which no one has cemented since Steve Waughs departure.