I'm all in favour but there are a few obstacles still to overcome.
The biggest hurdle -- Tony Abbott -- lost his mojo when he was deposed as prime minister; yet his legacy remained.
Turnbull (his successor) dissolved both houses of parliament hoping to get a majority in the senate but ended up with worse figures than before. He's trying to avoid a parliamentary vote that will cost conservative votes, though he appears to support gay marriage.
Shorten, the opposition leader, is now in a position to force through a parliamentary vote. It could go either way but the conservatives still hold power in Canberra and may be able to forestall it.
