"Gay marriage, the republic and a belief in science "
Turnbull brings communication skills and consensus politics.
Gay Marriage is off to a plebiscite - no change
Republic debate is off the table until the Queen dies - no change
Direct Action vs ETS is economics not science , and Greg Hunt's model and the intented reductions at the Paris meeting are remaining - no change.
Abbott / LNP had good policies in the main (some notable shockers). The issue was about bringing people with him on the hard choices. Turnbull / Bishop / Morrison have that in spades. Morrison in particular.
If those three take PM / Deputy PM / Treasurer, then Shorten is gone.