re: [Wrong] Sydney to Hong Kong VA80 & VA82
Armchair-airline-strategy wise it's probably best to have both Sydney and Melbourne flights to hong kong. Sydney's departure would meet the demands of Australia's main business city, Melbourne's departure works well for morning connections such as from Adelaide and Hobart (and from what I've read would be a better experience too for transfers). Hong Kong Airlines Gold Coast and Cairns flights would probably cover Queensland. VA could probably cut another A330 route to do the two city Hong Kong strategy (they have a fondness for that), probably Fiji. HNA did bring in a substantial amount of capital and they weren't even the ones that bought up AirNZ's share so maybe this is their way of shaping VAs future.
Smoke turns to haze though. Maybe this is just Virgins future planning and for some reason they've been punched into the systems even though no intention to sell the other city's flights until demand has been determined.