Just goes to show you don't sit on a one point lead and try to play keep away for ten minutes. Best defense is a strong offense. They should've gone for three.
By playing keep away, do you mean when they took the ball into the corners? That's pretty standard practice. It's only a bad move in hindsight because Ronnie delivered a perfect ball.
Based on how the game was going, I'd argue they'd have been better served booting the ball back into Portugal's half and parking the bus, given how inept Portugal's passing (and offense as a whole) looked, especially in the second half.
The US deserved to lose to Ghana in the first game. They deserved to win today. Sometimes, fortune smiles upon you. Sometimes, it pisses in your face.
They're still in a good spot to advance.