Australia have been traditionally aggressive in this form of the game.
Smith is lucky to be holding his spot in ODI
What do you base the tradition on? Certainly not Swampy and Tubby.
Bar Dean Jones, Straya havn't really set odi trends nor noted for more aggression than opposition. They've won and been successful by having fantastically talented players and outstanding team balance. Winning teams have less need to innovate if they continue to win.
Straya didn't do things differently, they just executed the basics better. Much better. With stronger XI's than the opposition post WI dominance. The best argument you'll have to counter is Gilly - but Stewart and Kalu preceeded him, Gilly was just better.
The only place Straya was innovative and novelly aggressive (bar Dean Jones' running between wickets) was fielding that started under AB and Bobby Simpson and starred Dean Jones and followed on by the Waughs. But everyone does fielding drills now. Even sub continental sides. And Jonty Rhodes and Chris Harris quickly became the benchmarks at 1992 WC.
There's no great mystery. Your #4 is failing and Marsh is scoring too slow. And theres sfa in the new white kookie ball on Aus pitches for your bowlers to expose both Roy's and Hales' overt frailities. With Lynn, Short and Maxwell in the wings, not to mention new ball wizz's Haze and Pattinson, Aus are well placed for the World Cup. Despite what Eion Morgan or JJ says.
Aus do need to decide on Lyon or Zampa soon though. Or no main spinner at all.