I know this sounds really silly, but I wish that everyone had the opportunity during year 12 to take units from a uni course you're interested in, that can then go towards that course as recognition of prior learning. As someone who has known what she has wanted to do for years, I always wished that they had more options for people who have made up their mind. There's VCE, VCAL and VET, but if I could have forgone VCE and the ATAR system, taken two units (say I took two general health units that could be used in multiple degrees across the year), and be judged on my performance on that to decide if I get into the course I want or not. Like, if you want to get into medicine, and you need chemistry from VCE, instead take a chemistry bridging course and then do a level one unit for chemistry instead. I know they have a version of this, but it's so hard to get into, and it's only in particular areas of study, rather than something that everyone can have a chance at.
I'm sure there are a lot of issues with this that I haven't considered, but it still would've been nice