Jason
There are many places in the World where you can visit on an Australian passport without needing to get a tourist visa beforehand.
There are almost NO places in the World you can visit on a Chinese passport unless you get a tourist visa first...and that is always problematical for a single Chinese Woman, but not so difficult for a Chinese woman married to an Australian Man.
Somewhere down the track, I believe it will be compulsory for Permanent Residents to eventually get Aus Citizenship...but that does not apply...at the moment !!!
Of course...if Xia remains a Chinese Citizen, she cannot vote, become a Politician or join the Military....DUH
I have also discussed this with Ming...and we came to the same conclusion as you. If she decides for her own reasons to get "Nationalised"
, then I will support her decision. If she decides not, its OK by me.
But generally speaking I can envisage that non-citizens could be somewhere disadvantaged in the future, if the whim of the Government of the day makes it Politically desirable...and who can judge that can of worms...certainly not me !!!!!