Here is my contribution to the discussion. I'll answer Red Roo's question first by saying why I am currently (for the moment) a loyal QF pax.
Since moving to Canberra from Melbourne around 4 years ago, I fly between MEL and CBR around once a month and still do. Back then it was on either DJ or QF depending on the cheapest fare. Two years ago, I changed jobs which came with the perk of QP membership. My spending patterns changed immediately. With QP access, I now fly with QF whenever possible, including international flights. For example, currently, I'm typing this up on QF 46 somewhere over the Tasman (to be uploaded when I get to the QP in SYD DOM). Air NZ was around $20 cheaper but I didn't hesitate in booking with QF. In addition, next weekend, I'm flying to Singapore (2 international flights in two weekends is not the norm for me - it's purely coincidental). When researching flights, EK (via DJ CBRSYD) was around $800 while QF was around $1000. I ended up booking QF even though EK was 20% cheaper. Why?
Two reasons. Firstly, I get access to the QP when flying QF. However, I recently found out (through AFF) that DJ is offering status matching for QFF members. Being SG, status matching gets me 'free' access to the DJ lounge, which in my opinion, is much better than the QP domestically particularly with its barista coffee (I'm eaisly impressed). I haven't had time to really consider if (a) I should get status matching with DJ and/or (b) switch alliances to DJ. And why haven't I? It's because of the second reason - status credits.
When flying for work, I usually fly in J so being a QP member is irrelevant. But I still prefer QF because of the sc (I don't get QFF points when flying QF for work). Now that I reached my goal of SG (only last week), the 'sc' reason for me to continue with QF is not much of an incentive anymore (another 700 points to reach WP is out of reach for me for my anniverary of 31 Jan).
So this got me thinking about Red Roo's question. What could QF do to QFF for me to not change my loyalty to DJ? (Captain has just announced that we'll be landing soon so I'll ponder this issue while we decend into SYD and continue this in the SYD DOM QP).
(Now in the SYD DOM QP). If the next tier is obtainable, then I would indeed continue flying with QF to try and reach that next tier. For example, at 1,000 SC, there could be Gold+ which could have benefits somewhere between SG and WP, or some sort of 'reward' similar to (but to a lower degree) what is offered when you reach 24,000 sc - maybe a single complementary entry to QF First Lounge (to give the member a taste to WP)? Another way that could make me not consider moving to DJ would be an improved (rather than enhanced) loyalty bonus instead of the current 5000 QFF points. 5000 points is not enough of an incentive for me.
Just my thoughts.