I am glad to see some similar sentiment of Xavi here, I thought it would be blasphemy to almost everyone to claim he wasn't the best fit.
I don't think based on this performance Spain/Barca need to totally revamp what they do, don't want to overreact.
That being said, it seems that in Barca's/Spains current state, if they come across a gifted, athletic, pressing team who also has a good defence, Xavi becomes a defensive liability. Tonight's game reminded me of Barca vs. Bayern. Just got killed on the counterattacks, and both teams (Brazil, Bayern) have solid defences and great passing and counterattacks. I do think much of this has to do with poor back 4 play from both teams, something Barca will obviously need to address.
I think playing the possession style football is obviously Barca & Spain's strength & not to go away from it, but it would seem another midfielder who can pose more of a scoring threat & defend will balance the team much better.
My random musings...opinions?