It's not for me to say, and I'm only looking from an outsiders point of view, so please dont put out a contract and send the hit-men of vmx to hunt me down.
Nationals are Nationals.
But the vastness of Australia doesnt allow its self to be 'travel' friendly so a track that can cater for 'all eras' and 'all ages' is always going to be difficult to find (I'm not saying none exist) so I look at different ways to accommodate all bikes and riders.
At present the 'Nationals' are held once yearly and held at different venues. That format works, and should be kept. But there could be a twist to the 'classes' format. At the moment all 'class eras' race on the same track and same weekend which makes for a very big (extended) meeting.
My 'outside' view is that the 'Nationals' could be (should be) still held every year but bi-yearly for the different 'class eras'. In other words, the Pre60, Pre65, Pre70 and Pre75 classes (including sidecars) plus 'age group races' could be raced the first year on a track that is "suitable" for those eras. The following year the 'Nationals' would be held for the Pre78, Evo, Pre85 and (when/if) Pre90 classes, on a track more suited to those bikes.
This still means that the 'Nationals' are held every year (albeit, bi-annually in reguards to classes) with more time to run the races (or less time to be away from home) on tracks that could show case the bikes in there respective eras.
My understanding of most VMXers, is that they have more than one era of bikes in their stables so they can still ride each year at the 'Nationals' and if they dont have bikes for both years then what a great excuse to get another bike
With certain 'eras' only getting to race bi-annually it could bring out more bikes, make the winning of trophies even more special because the trophy is held for two years and if a racer is less fortunate with finances and only has the one bike then he/she is more likely to go to the 'Nationals' every second year rather than every year.
Anyway, I'll keep looking over my shoulder for those hit-men, at least until Nathan stirs it up somewhere else