As a nation of migrants these difference will continue to exist. There is no magical wand that can make them disappear. Australia is unique any way as it is. The Vietnamese continue to eat rice instead of meat pies and roast potatoes. They prefer visiting friends, chatting and discussing the politics of their home-land instead of spending hours watching cricket or going to the footy.
Vietnamese parents continue to invest in the education of their children.
These things do not mean that they are less committed to Australia. There is absolutely no need to push for uniformity in identity. There is no need for us to be identified as Europeans or Asians. Fortunately, Australia is pretty well equipped for this environment already. So, we should not waste any more time and energy to resurrect the question whether we belong to Asia or Europe.