The problem isn't RAAus or weight increases etc.
The problem is the lunacy of having parallel general aviation systems when we all fly in the same country in the same airspace because CASA puts ridiculous regulation, medical, paperwork and hence costs on normal GA, particularly the low end. If the CASA system was rational and minimally confined to real safety issues there would be no need for RAAus, GFA etc and all participants would be in ONE mainstream aviation which has a long and rich history with a huge store of expensively learned lessons and corporate knowledge.
Which leads to RooDog's comment about maintenance: by having a totalitarian and draconian system nobody puts any more in a logbook than the absolute minimum. This makes logbooks somewhat useless and negates the reason for having them. RAAus and GFA have gone the same way.
Again, take a look at the Canadian owner maintenance system which has been in place for more than 15 years. In 2013 the FAA looked at it and concluded that there were no more accidents that could be attributed to this and that the aircraft fleet under this regime was in as good or even better condition on average than those maintained under the traditional system. The experiment has been done. Any knowledge training of what needs to be done can be written and published where it is available to everyone who needs it. There is no need for compulsory, expensive, in person "Maintenance Procedures" courses such as the cash cow run by the SAAA (who cannot even keep proper track of their own funds anyway). I have no objection to voluntary education courses run by such bodies. If they get out of the regulation business they may indeed by able to do this better.
The law and its administration should be done by the body to which Parliament gave the job - CASA, not little incompetent bunches of hopeless amateurs who cannot even run their own organisations properly.