Party leaders get changed when they become a liability.
Kevin Rudd may be a hard worker who is good at tweeting but many of his colleagues found him impossible to work with. I couldn't care less if Julia Gillard was involved in previous discussions.
Maxine McKew's book sounds pretty dull if she has to recycle such stale viewpoints.
Right now there are probably quiet discussions within the Liberal Party about Tony Abbott's future. All involved will deny it, of course, but such decisions are part of politics.