But J class in a 60" seat (so that's like CX's regional business class) so you can't really sleep, but no AVOD to keep you awake, and no free booze (I guess). No lounge access (once you lose the Diamond card, and only business class lounge before that). Gatwick.

Nah - I'll stick with my lowest published mileage earning CX Y fare plus 60,000 miles (48,000 net of the ones you earn) thanks very much.