Good comments on Brisbane. My own take on the transformation of the Roar under Valkanis into a hard-to-crack unit (so far), is that Valkanis has always been a CB in his playing days and this must have influenced his overall reading of the game.
He came from coaching in Greece, where 1-0 wins & clean sheets are prized.
Recently read an A Leagues article where he stated, the defensive part of the game doesn't receive enough focus in the ALM in his opinion.