its really not the end of the world if you don't get into law usyd or unsw and theres plenty of other options.. heres a summary of what i think:
1. well firstly - how much do you want to do law? and why? ask yourself questions such as: do you want to practise law? is it a passion? or are u merely doing it for prestige? also, if you research the job salaries of lawyers (go to gradlink or something) you'll realise that law's reputation of earning you shxtloads of money is not much more than a facade. not only that - its a quite a demanding subject. don't spend the next five years of ur tertiary edu wasting your time and energy on something you won't enjoy doing.
2. why don't you look into other unis which offer law - such as macq, uws or uts. i think they all offer law as a hecs course with a lower uai entry - this will save your parents (or you. who ever is paying) the great financial burden of full fees. sure, usyd and unsw have bragging rights and high degree of prestige - but a law degree is a law degree no matter which uni you end up going to.
3. yeah i totally agree - the uai entry system has its flaws. people may miss out on their courses by like 0.05 but i guess this system is as fair as anyone can make it thus far. i guess it's just tough if you didnt achieve the uai score high enough but hey - i repeat - theres many alternatives
4. as a full fee student you have to take into consideration you're in a class where the majority are 99+ hecs students. whether this type of competition/pressure is bothersome is up to you to decide.
5. if you want to transfer from full fee to hecs in ur second year - go research how hard such a transfer is - and if u dont manage to transfer, will you be able to fund your entire degree as a full fee student? thats gotta be pricey
6. also, youve got to run the chance that if you fail a law subject you may have to do that subject again. which means youve got to pay - AGAIN.
anyways, theres my opinion - hope it helped! btw for the record im a macq law student, bt i tried to be as unbiased as poss!