Move your flow control out to 300 miles or more and you might find a little more accuracy.
How about moving it out to 2500 miles. I've been in Australian airspace for 5 hours. Just give me a guaranteed reservation time at my feeder fix. If I make it there at the agreed time then don't mess with me! Losing 5-10 minutes over 5 hours in the cruise is safer and beneficial for the pilot and controller (less tactical workload), company and passenger (saves money) as well as the planet (saves petroleum and emissions).
I know I know, the system isn't strategic enough to cope with that level of foresight. Well it needs to change.
But..I have to agree with much of the sentiment here. Without pointing the finger at individual ATCers, the system of controlling in Oz (particularly MEL) is among the ****ey-est in the world.
(Ps. And as an aside...whats with the snarky denials of a roll-thru on 34L in SYD when there is NO ONE on final or at any holding point waiting for take off!)
PG