Overton and Leach managed to survive for 10-15 overs against the raw pace of Hazlewood, Cummins and Starc (who was wayward at times).
Don't forget that Leach hit century? (probably not, afaik it was 92) in the first match. Therefore, I would say it was lucky Australia yesterday, otherwise, match would have been a drawn. I was surprised by Overton, he struggled 105 balls alone.
If this match was a drawn, the 5th would be another piece of final, but now it has turned into a win for England but a drawn is sufficient for Australian.
The third test was not a devastating defeat for Australia and England won by one wicket to spare chasing a big total
It was a miracle, no one expected England can win this match. In test, such almost impossible match barely be chased. I can't remember when I last time saw such a chase.