Sven may have been very successful before managing England, and he certainly didn't do a crap job in his time with the national team, but I'm sure I'm not alone in feeling that on the big stage, England ultimately underperformed under him - the Brazil game comes to mind when we had a man advantage and half an hour to equalize, and instead of really going for it, seemed to settle for an 'honorable' 2-1 defeat.
And then, at City he had a good start, results-wise, but that included some pretty narrow victories against poor opponents (1-0 home win v Derby comes to mind). Then we all know what happened in the second half of the season, when I think we were picking up points on a par with the relegated teams. Even with a lack of squad depth, after something like a 40 million quid outlay, that wasn't too clever. And I don't even want to think about Middlesboro - I'm sorry, but some sort of 'loyalty to the boss' defense just doesn't cut it. When players want to make a point in support of a manager, they usually try to win for him...
So what has Sven done since leaving City that suggests he's still got it? Almost got Mexico knocked out of the World Cup in the easiest qualifying group in the world, before they fired him and squeaked in, and then the whole "Notts County" fiasco.
He may have been a great coach in the past, but he's not done anything recently to suggest that he's a great coach anymore. When players get past it, you can point to a loss of speed or lack of fitness to explain their decline, but I'm sure a lot of it's just that the fire goes out - they're no longer willing to put in the effort they once did. Managers obviously aren't adversely affected by physical deterioration, but they can still lose the drive and ambition that once fuelled them. They might also fail to adapt to the way the game changes from one generation to the next. Whatever it is with Sven, I don't think he's been at the top of his game since he came to City, and I don't believe we'd be any better off if he'd been handed 200 million to play with.