Why would QF cut off a source of revenue that is probably making them a profit?! I fly enough to make Silver, and have a corporate-QP membership, but even at the reduced rate I can guarentee you that QF is making a profit out of me. Why would they cut that off? Also, PAYING for QP is the ultimate source of loyalty. I'm actually paying for the priviledge of effectively trapping myself into flying QF.
Removing guest access to the J lounge would be an obvious one - If you have guests, go to the QP.
(This post was written from the MEL J lounge, where on a sunday it's reasonably well utilised - lots of kids in here too, I assume due to the school holidays. I can see why it'd be painful during the week)
PS. Is there some reason they have a table setup with 10 placemats with knife/fork/inflight style napkins on them? They've been there since I arrived at 12.30 and haven't really been used)