Who is your pick though? Swepson?
The Aussies have an aging squad: too many players in the squad over 30 (especially in their mid 30s, across all 3 formats) that will be retiring within a short interval of each other, hence Aussie supporters in for a long, painful rebuilding process (worse than what happened post-Warne/McGrath/Langer/Martyn/Gilchrist/Hayden). Unfortunately, the selectors made a huge blunder last summer not blooding some new players, especially in the Windies and NZ test series.
Regarding Swepson....it's clear the selectors have no faith in him, hence why he's only played 4 tests (across Pakistan and Sri Lanka). I doubt he'll ever play a test in Australia, only being potentially selected for tests in the subcontinent.
Furthermore, the selectors need to be looking long-term, keeping an eye on any leggies at Shield and first grade level in the 18-25 age demographic, as coaches such as the late Terry Jenner have been correct in saying that leggies take time to develop. The frustration he noticed towards the end of his life was that most coaches/captains/selectors at any level of cricket don't have the patience of those in past decades, and are very quick to discard the leggie onto the scrapheap the moment he doesn't perform well, or when the leggies do get selected in the team, the frustration of barely getting a bowl.
With Bailey/McDonald/Cummins at the helm, I don't see this attitude towards leggies changing at all whilst they're in charge