Will you be able to request a points upgrade from Economy Reward seat? If so, how many points?

Virgin are actually continuing to operate many more commercial flights than the list you have posted here. The list you have sourced is only the routes which have had frequencies reduced. For example, Perth to Kalgoorlie, Port Hedland, Newman and Karratha will continue to operate at standard freq...

Qantas also offer on arrival lounge access to Qantas Club, Gold FF and Business Class passengers on overnight red-eye flights from Perth to SYD/MEL/BNE in order for them to freshen up/have breakfast in the morning.