To win the Ashes, assuming no draws, England's attack have to get 60 wickets in 3 tests.
Our spin attack does not inspire confidence. Swann took 14 wickets at 35.5 in 2010/11, the last time the Aussies lost on their home turf to an England side. I cannot see Bashir, Bethell and Root cobbling together 14 wickets between them. I can see Nathan Lyon taking that many and a few more for the soap dodgers.
All pace? It may be ok at Perth although it isn't the same nowadays and may be the Gabba, but at the MCG,SCG and Adelaide you need spinners.
So even if the England top and middle order do fire, and i think its pretty even between the two teams batting-wise I fear the worst, their pace attack is better if two of the three of Hazelwood, Cummings and Starc are playing and the goat will be the pivotal difference.
Aussies 3 -1