Sadly England still have too preconceived an idea of what makes a winning ODI team and don't have any elements of what makes a winning ODI team. They think the batsmen are the key, somehow putting players in certain positions (keeper opening etc) will produce big totals, having batting down the order to finish it off and then just bowling economically will win the game (or bowling economically then batting to victory)
Truth is England don't have wicket takers, or don't try enough to take wickets. You can look at the positions at certain points in the innings throughout the series and see Australia had more wickets in hand, BUT that also means Australia had TAKEN MORE WICKETS................. It is what slows run-rates down, England seem stuck in the past thinking slowing the run-rate down takes wickets. Our bowlers aren't even always that economical, probably in part down to not taking wickets.
And if anyone doubts what I've been saying for a few ODIs now, England posted a good total and never really looked liked defending it. Even with the aussies four wickets down needing something like 60 at seven an over we never looked like we'd get that wicket or two that could win the game. Even though one or two aussie bowlers were expensive, they picked up wickets.
So what is the solution? Rethink our line-up unfortunately, rethink the policy of using bit-part bowlers as much and get in at least four bowlers who can take wickets and bowl through their 10 overs without having to fill in their overs like we usually do. Sidebottom bowled reasonably for a change, Broad had a poor game in the field in general while Bresnan, Rashid and the supporting cast didn't look as if they'd defend 299 and that is pretty feeble. While I think the batsmen need to apply themselves, be sent in with more sense to the order and the senior partner look to bat through rather than everyone try to score at over a run a ball and leave us losing wickets too regularly. The bowling needs a shake up, Sidebottom, Bresnan and Anderson perhaps need to go, bring in Onions for one and a couple of others with the primary aim of getting wickets. Pick the top county one day wicket takers if they can't work out who is the best, if that is Bresnan, Anderson and Sidebottom then we're in sheet and need to work out a way to get wickets out of those bowlers - variation, less defensive fields or something different.
As I recall we got beat 5-0 by Sri Lanka not so many series ago, 7-0 would be the ultimate humiliation and if England continue to pick the same (sets of) players then they can't expect to fare much better elsewhere