Take a step back for a second and ask yourself am I getting any value from frequent flyer points? The reason I bring this up is I know a lot of people sitting on frequent flyer points saving it up for some indeterminate goal. At the end of the day what these points get you is a ticket to somewhere. Hence, if you aren't someone who travels much, they won't provide much value to you, and looking for an alternative (like cash back) might make more sense. For me these points are an absolute necessity. I've booked round the world trips in business class for the same price you'd spend on a roundtrip economy flight to North America. It means being able to book a flight at the last minute when fares are hundreds or thousands of dollars for next to nothing. It means being able to change my booking for next to nothing, versus having a worthless voucher.
What we do know about Qantas and Virgin is they both can provide good value if you are looking to book award flights be it domestic or international. I would say Qantas has a slight edge in the sense that they have more partners than Virgin. However, the limited partners Virgin does have tend to make more award flights available to them. You are more likely to find an award business class seat from Sydney to LA on United than you ever will on Qantas or American, that's a fact!
One other thing I will point out is that you need to be careful when you use terms like "swapping" points. Most frequent flyer programs charge a fee for transferring points to other accounts, so you'll want to read up on the specific frequent flyer programs to ensure you aren't incurring any fees. If you are gonna incur fees the way you make the swap occur in practice is either with family pooling (in the case of Virgin) where everyone's account shares a common pool, or you simply make an award booking from your frequent flyer account but put their name in the reservation (most frequent flyer programs let you book award flights for relatives, no problem).
-RooFlyer88