#2 Rigid style of play

A traditional 4-4-2 system has brought results for Barcelona in the league and in the Copa Del Rey but after their ouster from Europe, questions are bound to be raised on their style of play.
A conservative approach has helped the club to get stabilized but is it helpful in the longer scheme of things? Valverde's primary emphasis is on maintaining the defensive shape of his side which he managed perfectly until the Roma game.
But after that result, Valverde's tactics are now looking a bit too flawed. Lionel Messi and Andres Iniesta have been working overtime in creating chances with Messi, in particular, having to come too deep to get involved at times. The dependence on Messi is high as ever before which was proved in the game against Sevilla recently.
Also, when things are not going according to plan, Valverde has failed to shown tactical flexibility to deploy his team in various systems.