Phoned up today and got the loveliest person in Hobart!
4x Business rewards 23rd December PER-BNE - no economy for days either side (interestingly this flight had D and I availability, the other option 2hrs later didn't have I only D)
2x Business 1st Jan BNE-PER - No economy either and both flight options has 2I and 6D, was 2 flights showing N class so was quite interesting.
Wasn't complaining about J as still saved 5k compared to purchasing same flights thanks to a late leave approval.
I hung up actually thinking there is some hope at Qantas when you experience a staff member as lovely and helpful as I had.