We've only been here 6 months but to be honest I don't recognise some of the descriptions here of Melbourne weather. Don't know if you acclimatise? It is not cold in the winter, it's very dry and you don't get endless grey days. When we left the uk in early April we'd just had 4 weeks of snow on the ground and grey skies, with temps less than 5 degrees. Here think uk spring temps in the winter.
Agree houses here are drafty and decent heating helps. 14 degrees is not cold by uk winter standards but not comfortable if that's the temp in your house.
Rare there's a day without any clear blue skies - cloudy days normally clear. If it rains it properly rains but doesn't drizzle for days on end like the uk.
It is very changeable - not uncommon to change 10-20 degrees from one day to another.
And to be honest, having just gone through our first 40 degree day, I'm glad it's due to drop 15 degrees in the next 2 days.
Overall significantly warmer, with much more blue skies vs the uk, but windy and very changeable.