Problem is who can you bring in Bairstow apart?
People like Darren Stevens opening the bowling in county cricket is not much of help either.
Agreed the selectors aren't overburdened with choice, but the BBC lists 5, with their season's runs, averages, 50s & tons:
Jonny Bairstow Yorkshire 906 100.66 5 3
James Hildreth Somerset 853 44.89 1 5
Alex Hales Notts 603 43.07 2 1
Nick Compton Middlesex 769 40.47 1 5
James Taylor Notts 599 39.93 1 4
Bringing in Bairstow is a no brainer. He's in incredible form and his boundless enthusiasm and optimism might come in handy. However, he's not a number 3 and Ballance has got to be first up in front of the firing squad, Lyth second. I'm inclined to keep Bell on his home ground, preferably dropped down the order a place or 2.
No easy options, but putting out the same XI would delight the whole Aussie team. I'd probably pick Compton for some grit.