Hi,
I haven't done a whole lot on this part of AOS 2 (only just finished the first half of it on Friday). But from what I can understand the 5 entrenched rights within the Constitution, that is:
1. Acquisition of Property
2. Trial by Jury
3. Freedom of Interstate Trade
4. Freedom of Religion
5. Freedom from Interstate Discrimination
Are not outdated, and are placed to ensure the rights of the citizens of Australia. I have come to this conclusion as the rights do not seem to benefit the Commonwealth in any way, and in fact Freedom of Religion (Section. 116) is used as an example of a restriction placed upon the Commonwealth law-making ability. Whether or not they are outdated is very much up to personal belief and interpretation. I personally take the stand, that while these 5 entrenched rights perhaps dont cover the full breadth of what needs to be protected in this day-and-age, they are still relevant and applicable in society ie. do not lag behind.
Hope that helps!