The Aussie bowling isn't the problem for the most part even though I missed Tye's century.
I think it is more a problem with Australian team balance and batting approach. Australia used to bat deep with Haddin at 8 in the last World Cup, now they often have Agar at 7, Paine and Carey both in the team at 5 and 6. That is woeful. Stoinis is the top 4, and yet there are bowlers from 7 down?
England, win or lose, are going to keep regularly posting well in excess of 300 on flat pitches, doesn't matter if its India, NZ, SA or Australia.
They bat deep, Woakes at 8 often, Willey at 9, Plunkett and Rashid at 10 and 11 (seriously look at their FC stats), and Bairstow, Roy and Hales just start swinging every game. Root is the only measured batsman, and even he is striking at over 90 when he bats 3. Stokes, Buttler, Ali - they're so jacked up on confidence knowing that even if they fail and the team spectacularly fail, that they're not going to get dropped from the ODI team and this is how they will continue to play at the World Cup next year.
Australia thinks to solve this they need to increase their bowling? No. Australia needs to score more runs especially in the first 25 and 40 overs.