We recently moved our AsiaPac CFO from Sydney to HK. He had top tier with QF but nothing with CX/MPC. A call to MPC to explain his relocation along with evidence to show he had (I think) 8 return trips in J already booked resulted in Diamond being comped straight away.

From what I can make out it was a rarity, and as I've just got Diamond for the first time this year through the hard slog, I was less than pleased with his smug expression in my office...

Worth a try anyway, but not sure I want to know if you succeed!!!