Pretty sure it will carry.
Replace Siddle with Hussey if he was fit and make White keeper.
Bring Michael Hussey or Phil Hughes in as keeper?
I'm not sure if Australia's pace attack will perform as well/be as fearsome as is being suggested, particularly on the generally slow and low pitches of the Caribbean. I don't know about playing any of Australia's pacemen above No.8 either, surely a deep batting line up would be preferred so the specialist batsmen can be as aggressive as they want/need to be. Australia has adequate part time options anyway, no need for any more than four specialist bowlers in my opinion.
So overall playing the 4-prong can be very fearsome. All of Tait, Nannes, Johnson are very clever bowlers, they wont just run & look to bowl fast every ball. Only Lee is the issue here - so wish Bollinger was in this team.
That didn't seem to be the case in the second T20I Australia had against New Zealand, Tait and Nannes kept bowling it fast, McCullum kept on taking them for runs.