Interesting thread - I'm on your side Jaba.
If anything it's educational and will hopefully make some inexperienced pilots think a little longer about whether they have skills and experience to navigate in such conditions.
The track suggests (pure speculation of course) there was some indecision due W of Sunshine Coast because of the reversal, and then continuation on a NW heading. Tracking then continued S and SE skirting the WX and the run to Archerfield was behind the worst of it.
Not the sort of WX I'd like to be flying near but your detractors here are probably are so much more experienced than you and I and know everything there is about WX avoidance.
Maybe the pilot of LWV reads Pprune and could end the speculation.