If you take a look at google maps, where there are 3 red spots on the map, on the left hand side of the HBA terminal, those 3 spots could be where the Airport Fire Service is located, if they move that more towards the left, to where those trees are, the terminal can be expanded that way, without changing the runway.
Adelaide Airport did it, they combined the int and dom terminals into one, and the former dom terminal is now that major carpark.
Granted that VA does not fly to WLG anymore, but for that airport, its hard unless the airport starts buying the golf course, and expand it that way.
On the point of the gist of the thread that is: but with Aust airports only having one way aerobridge down to the plane for dom flights, it will be time consuming to have priority boarding, I mean, the real deal.
We have "our Aussie way of priority boarding", because once our BP is scanned, we all have to merge into one line to get onto the plane, and only split where the airport/airline lets people board and deplane via the rear doors, ie, have to use the stairs.
Until we have a way of getting onto an Aust dom flight plane via the middle doors, (grin, wry one), priority boarding will for both airlines be a fail.
Ok, so you get your BP as an SG/WP/P1 scanned first, but once past that point, its the fastest ones that get on first. no matter what tier you are.
Not to mention that some readers of BP at the gate take a few go(es) for the green light to pling.
Some people still like the paper BP, and this can also affect PS (priority lane scanning of BP and also PB (priority boarding).