Blockla, you are full of it, I flew in/out of HK for over 4 years, how bout you ?
We regularly landed 5 nm behind a heavy ( sometimes just over 3 behind a medium ), think about it, we were at 1500'/5nm/GS 2-2 1/2 miles a minute when the heavy touched down, not exactly ground breaking death defying stuff, but please carry on in your little dream world.
Nautilus, is was not a perfect system and of course not everyone can hold 250IAS to 15nm, I am not that stupid. There was vectoring, speed reductions etc but the cold hard facts are they handled nearly double the movements of PH with their own unique problems like terrain, weather, multiple different nationalities and multiple airspace restrictions very close to HK.
I am not saying Aus ATCs are useless , I am saying the current system was great 15 years ago but it is a joke now ( just like the whole airport ) and it will get markedly worse in coming years, something needs to be done other than saying " we've reached capacity ".