Has Julie Bishop reached her use-by date?

There has been much speculation in the media this week about whether Deputy Leader of the Opposition, Julie Bishop, is about to lose her position.
I'm just surprised that it has taken this long before talk surfaced.

After all, in the boys club atmosphere of the Liberal Party of Australia, her elevation to deputy leader was more a case of PR value in 'matching' Labor's move to place a woman as deputy prime minister.
Such PR always has a use-by date.

Ms. Bishop is no Hillary Clinton. She was never a serious contender for leader, so the jockeying for her second-in-command seat is perhaps beginning in earnest.