A problem I've always had and not been able to solve is that I can't see how to make a flight booking NOT with points when logged into Velocity. I have clicked every damn button there but all I get is points offers etc. My only way to manage it is to come into the main site without logging in, make the booking and then click the box that says something like "are you a Velocity member?" and the details go in automatically. For this reason I keep two bookmarks of the relevant pages.
Now I can't believe the website can be that bad and it's just me but if it is the case then it is a problem.
Not sure what other problems people have. Seems to work okay except I don't like how the default setting is to select their travel insurance for the flight - of course I always spot it and de-select it but they do have a nerve. I guess it's just business though.
Have you tried logging in, then clicking on the Virgin Australia logo on botto, right of screen? Works for me, takes you back to virgin home page where you can book flights and you will also still be logged in to your velocity account.