All the talk is that he'll get England mentally right. They still can't comprehend that ball retention and technique is where the players fail and as long as they think like that they can have Harry Potter managing them and they won't win anything. Nobs like Michael Owen and Alan Shearer perpetually spout on that England's players are better than the players at the other top teams. They were outclassed by Croatia in many facets of the game at Wembley and Croatia will do well to get to the last 8.
My personal theory is that teams like United who play and win by playing a high tempo attacking game where the players work like mad to regain possession when they lose it (which is frequently because they're happy to put in crosses early) works well in cool climates. This style of play suits England well.
In the soaring temperatures of summer tournament football this style of play is simply not sustainable. My worry in this context is that in South Africa it won't be as hot - it's their winter in June/July, yes?
England are like Paula Radcliffe: good in cool conditions, outclassed in the heat.
Can Capello change that? I doubt it.
I think it's becoming clear that Ericsson is a far better manager than they gave him credit for and I'm not sure Capello will do much better. Q/Fs, maybe S/Fs. I'm not saying England will never win anything - if Liverpool can win the CL then England can win a tournament, but they'll need an awful lot of things to go their way.