The general consensus with scaling is those who do subjects which scale down end up getting much lower ENTER scores than those who do subjects that scale up high. I myself did three subjects which scaled up by a fair amount and one which scaled up above 50. Yet if you calculate my aggregate score without scaling, then my ENTER score will only be 0.05 lower. And so my ENTER score is based on the fact I did hard subjects that scaled up high, it's because I did really well in those subjects, and the one that scaled above 50 balanced out my English score that scaled down.
The whole thing of scaling was introduced to standardise subjects. It is fair, it's just people abuse the system by choosing the subjects that do go up a lot. And these subjects only go up a lot because the cohort are a bright bunch of students who perform really well in other subjects. Of course you can't compare the difficulty of subjects. For example you can't say that Methods is harder than History. For a bright maths mind, Methods is easy yet History would be difficult. A flaw exists there. It is only resolved in maths subjects where Spesh is harder than Methods which is harder than Further. Hence the harder the maths, the higher the scaling.
A lot of people forget that VCE is actually a competition. Your score is your ranking amongst the state, hence why there is scaling to rank your score from one subject to another. As with the 99.95 ENTER score sometimes requiring aggregates above 210, this does destroy the system. It means someone with 6 perfect 50s can only get 99.90 and not the perfect score they deserve. What they should be doing is if you get 6 perfect raw 50s, then you automatically get 99.95. The aggregate required should not be above 210, it should be achievable by any combination of subjects. If this happens, then VCAA can be happy that the years cohort is extra intelligent.