I think we would just see JQ international scalled back 70%. They shoud just keep:
-Christchurch
-Bali
-Bangkok/Phuket
Thats it, no japan, no nothing
AirAsiaX are going to beat JQ in the MEL-KL-London. They will have better and newer aircraft(IE-good IFE, nice cabin!, nice mood-lighting and you can order in your seat) Beats just sitting in a leather seat looking at a wall in the brightness of JQ's Lights!