Even EK didn't operate their 332's DXB to anywhere in OZ, and their whole business model was built around starting destinations with the 330 then adding a 777 when the loads demanded. I am not a 330 officianado, but I know a bit about the 777, and i doubt you will see the 330 on a direct route to AUH for any length of time.
But i've gotta say, I've been wrong before (a lot), and JB has told me directly that he believes the 330 to be better than the tripler into Asia. I think he's wrong, and wrong in a big way, but I'm not making the decisions. My bet is 330 to Asia. 330 to AUH initially because all the 777's are going into maintenance next year, so we will be a jet down for several months (unless the rumours about EY 777's turn out to be true), then the 777 will pick up the direct AUH route (if there is one) just like Emirates do out of PH, BNE, SYD and MEL.