To be fair to J* just once, J* management will have been cautioned, on pain of death, NOT to even think of improving customer amenities on J*, lest they draw traffic away from the QF domestic service.
In my opinion everything about J* has been carefully designed to cut into
VB's operations but avoid at all costs cutting into QF domestic.
Thats why the advertising and marketing is the way it is. They want the suit and tie business brigade to stay with QF domestic, so they build an airline that only competes for the low end passengers of the
VB operation.
My suspicion is that QF is engaged in predatory pricing (selling below cost of production), but it would be virtually impossible to prove since I don't think the ACCC has staff who understand the subtleties of airline cost structures.