Australia scrum-half Will Genia could be set to lose his spot in the starting XV just one week on from captaining the side.
Genia lead the Wallabies in the absence of regular captain James Horwill in the 38-12 defeat to South Africa last weekend.
According to commentator and former Test player Greg Martin, Australia will replace Genia at scrum-half with Brumbies number nine Nic White.
With Genia dropped to the bench, number eight Ben Mowen is set to lead Australia in the continued absence of second row Horwill, said Martin.
"He (McKenzie) talked about dumbing things down - maybe they're playing too complex a game plan," Martin told Triple M Radio.
"They've got a Test in Perth against Argentina on Saturday night - they will be dropping Will Genia to the bench and replacing him with Nic White.
"Ben Mowen, playing number eight, will become the new captain of the Wallabies."
Martin also stated that Quade Cooper's position at fly-half was far from guaranteed.
Australia have used three different players at 10 over their last four test matches, with James O'Connor, Matt Toomua and most recently Cooper having a run at the crucial position.
Martin believes that the inclusion of White at scrum-half may see Wallabies boss Ewen McKenzie partner him with club team-mate Toomua, working with Christian Leali'ifano at inside centre to re-establish the Brumbies 9-10-12 axis at Test level.
"No word on Quade Cooper, but they're thinking about getting rid of him and putting Toomua back at five-eighth," added Martin.