Prime Minister Tony Abbott is expected to reshuffle his own office, with three key staff members including his communications chief to move over summer.
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The Abbott government has faced sustained criticism of its communications strategy and a fierce backlash from voters over its unpopular first budget.
Speculation is rampant among Coalition staff that Mr Abbott's media chief, Jane McMillan, will not return to the Abbott office after clashing with chief of staff Peta Credlin over the government's communications strategy.
The disagreement between Ms Credlin and Ms McMillan came to a head on Thursday, after Fairfax Media was leaked information that Mr Abbott would spend the weekend pondering a frontbench reshuffle, which he then unveiled on Sunday.
That unauthorised leak is said to have angered the Prime Minister and attracted public criticism from outgoing Assistant Treasurer Arthur Sinodinos.
It is understood that Mr Abbott's deputy chief of staff and political strategist Andrew Hirst, who was a senior media adviser in opposition, is in line to move into the role of media chief.
The Prime Minister's office told Fairfax Media that Ms McMillan had taken five weeks leave over Christmas, as had been long planned, and that she had not resigned.
But Fairfax Media has been told by multiple sources in Coalition ranks that the changes are in prospect and Abbott government insiders suggest Ms McMillan will not return.
Many pointed to the exit of well-regarded former Abbott media adviser James Boyce, who took leave and did not come back to the Prime Minister's office.
Ms Credlin's executive officer, Kate Rutherford, who has worked for Mr Abbott for nearly a decade, will also leave his office in the coming weeks.
The government has endured months of criticism for its communications strategy, including confusion of whether the GP co-payment was going to be dumped or not.
Even supporters of the Prime Minister such as conservative commentator Andrew Bolt have warned the government must "change now or die" and "fix its communications weakness".
The departures are set to come after criticism in recent months of Mr Abbott's office, much of which has focused on the influential Ms Credlin.
Ms Credlin is also said to have clashed with Foreign Affairs Minister Julie Bishop over her attendance at a climate change summit in Peru.