Interesting midfield formation, Chris.
I have a serious gut feeling that Koeman actually, deep down, wanted Messi to leave. He obviously will never admit it, but that's what I feel.
That doesn't mean I think Barça would be better without Messi, but I think Koeman planned to rebuild this team with the attack centered around Griezmann, with intense pressure and athleticism from all players.
It will be interesting to see how he will fit Messi on that equation.
From what I read on Twitter, people were impressed by the effort and commitment put by the 2nd half formation to win back the ball.
I still think Barça will regret the Arthur deal. Many Barça fans are writting him off as a failure because of 2 games after the pause, but he was one Barcelona´s best players in the early part of last season and under Pirlo, he will grow a lot.