I find it bloody funny that some of the people here giving advice haven't even started uni, let alone know what's it like to pursue a career after university (with exception to Mel)
As what Mel said, a law degree is quite difficult - the readings are huge and very difficult to comprehend, its downright competitive and frustrating when it comes down to assessments - it requires a lot self-drive and passion, especially doing the really boring subjects like legal jurisprudence (IMO anyway). There is no doubt that there is an oversupply of lawyers due to the GFC, the Big 6s like Mallesons / Freehills / AAR are cutting down their staff sizes. Even the mid-tier firms are finding it very hard not to cut staff. So far there hasn't been any noticable effect on your typical small suburb solicitor. Having said that, by the time you graduate the economy would have rebounded and there should be a renewed demand for lawyers.
Not everyone who does a law degree goes on to become lawyers, last I checked, perhaps only half of those finishing a law degree goes on to get a practicing certificate to become a solicitor - many become policy officers, accountants, investment bankers and government analysts.
A law degree definitely helps your prospects of finding a job, employers recognise that its more than just a piece of paper, it demonstrates a way thinking and that you are a highly driven person. I've went to over a dozen job interviews within the corporate world (Big 4 + IBs) and major government departments, and most HRs responded that they would prefer a person with a combined law degree over someone with an single degree (ceteris parabis).
If you are fickle about the reputation of UWS, I would recommend that you do a first year B App Fin / B Eco @ Macq and transfer to B Com / B Law after your first year. It allows you the flexibility of studying finance / economics / law. You'll get academic credit for all of your units so you won't have to spend another semester catching up.
Macq has an excellent reputation for finance / economics that would rival UNSW but its law degree could be better. Macq's law course is more dedicated to inter-contextual work (what the law should be) and not enough focus on black letter law (what the law is). I understand that there is a lot of take home exams with Macq's law degree, so its not as stressful as a 3 hour closed book contract law exam that I did at Usyd law.