The OzAF are intending to operate their A330s in the receiver role - but not with a probe. Fitted 'for, but not with' a receiver system would indeed seem to make sense, Arters.
Of course the OzAF also have to haul that lumbering great boom around with them. But now that the 'Pig' (F111) is to be replaced by the Super Hornet rather sooner than many thought, I wonder whether they will actually do very much boom AAR?