I don't see why QF couldn't re-start an Asian hub to LHR and other European destinations
They have flights into Hong Kong from Melbourne, Sydney and Brisbane all arriving within 1 hour as it is, although HK is slot restrained
Perhaps they could look at timing Singapore flights the same way
Sydney a380 and on to London
Melbourne a380 and on to London
Brisbane 747 / a380 stop and return
Adelaide 787 and on to Amsterdam
Perth a330 and on to Delhi
Canberra 787 and on to Paris
Gold Coast a330 stop and return