I have thought that England will win the Ashes for months and of course more confident now after Cardiff. The Aussies are a poor ageing team. Harris is a huge loss - a Mcgrath stepping on a ball moment. Their batting is brittle with over reliance on Warner, Clarke & Smith. No one else can make the big hundreds required to win games. The bowling is their strength but Johnson is erratic outside of Australia and Starc struggles with the physical demands of test cricket.
The worry for Australia is that they will remain a poor side for a few years given the lack of young talent coming through.
As for Cardiff - they were never going to get close to 411. Johnson didn't make the pitch look easy - just a chance to score some easy runs when the game was dead and the field up.