Interesting, but relevant point nioka.
Since the demise of the Democrats who espoused to, and were probably considered to be the middle of the road balancer between the Lib's and Labor, there has been a bit of a vacuum where people are more often torn between two extremes.
Probably a good time for a new political party representing the middle ground. Actually, at one point it looked like the coalition of independents (I think they may be more so in Qld) might formalise something more substantial.
Btw I think Turnbull would be happy to go deputy to Rudd who has more public appeal esp. from traditional labor.