Apart from the fact that you'd be consigning your daughter to many hours of horrible (and *** dangerous) commuting every day, I know of two Australian families who have pulled their children from the Australian school in Sharjah and have not one solitary good thing to say about it.
IMHO, you'd be doing your child an enormous favour if you put her into a boarding school in Australia and let look upon the Sandpit as a place she came only for her school holidays.
Switching from the Australian system to another system at that age will cause her all sorts of grief.