A few of my suggestions:
- lifetime Platinum
- limo pickup and dropoff for WP longhaul pax (or even all J longhaul pax) - when I travel Etihad I just love the limo, compared to the ubiquitous MaxiTaxi that comes when I travel QF
- overhaul the PG benefit; whenever MrsHW travels it's usually with me anyway; and there's nothing like the sour look on her face when she gets the PG letter that says "because Mr HW flies so much..." - as if she needs reminding

Maybe options to convert the benefit to gift vouchers etc would provide flexibility.
- I much preferred upgrade credits that could be used for ODUs (didn't cost Qantas anything since they were flying with an empty seat anyway, made my flight a little happier = goodwill)