QF do not treat their top tier (WP1) that much better than the rest of the bunch.
At least QF platinums have much better lounge options (both domestic and international)
For me it comes down to a trade off between economy X and lounges for platinum pax of the competing carriers. If I didn't need the extra leg room I'd be jumping ship in a heartbeat, as any one can see the writing on the wall for virgin.
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