I get where you're coming from with the corporate angle, but I feel that having a degree of uniformity reinforces the links between them all, and the template used is distinctly Australian. The state flags, with the white hoist+state colour fly they're pretty dissimilar by comparison with the current flags, which are all blue ensigns with the state badge. I do note that all the proposals I've seen to change the states' flags has them all on a common template, so I'd say that there is a wish to keep them similar but distinct.
I agree that seems to be what people design but I never think it would work in practice. I like to try and consider realism, especially in such a political situation.
Flags should mean something to the people who they represent, and such uniformity in my opinion is a terrible idea. The Australian Federal Government shouldn't just be able to
rebrand the states as if they were a line of soft drinks. Every state should have to have a referendum or competition to chose their own symbol, and even if you insist that your designs are one of the options all it would take is one vote to not go your way and the whole idea is ruined.
Likewise I still don't like how you're treating the external territories. They chose their own flags, in the case of Christmas Island through a competition in the '80s and had to fight for decades to make it official. Now you're overwriting their will and imposing standardised templates on them? How is that any different from British colonial flags?
I'm not sure what you mean by consistent colours here.
Sorry, by consistent colours I meant you should keep the hoist pattern the same for the national flags.
Quick and dirty mockup (I also changed the stars on the civil air ensign to gold, firstly to differentiate it from the air force one but also as a callback to
the original civil air ensign used in WW2):
Those are elements of the central government, they can and should be consistent.
The states are separate entities, they should be distinct.
In the Queen's flag, the NSW element is the only one I wasn't sure about for precisely that reason, but at present the NSW, Qld and Victorian elements are pretty rubbish compared to how the state badges actually look, and the Tasmanian lion is fairly bad.
That's not really how it works. Since they are heraldic devices the elements are the important bits, not the exact design. Look at the Tasmanian lion
here,
here,
here and
here. All that matters is that it's a red lion in that pose, the number of hairs in its mane is irrelevant. That's an important difference between national symbols and corporate logos.
The coat of arms of England is
three yellow lions on a red background. That's all it is, a description. So
this,
this,
this and
this are all perfectly valid representations.
Modern logos are the exact opposite. The Apple logo isn't just
a white apple with a bite out of it, it's
incredibly specifically designed. Likewise
Volkswagen or
Shell.
Sorry if that's a bit of a rant, I just wanted to explain my philosophy when it came to these sort of things.