#2 Overdependence on Lionel Messi

Lately, Barcelona's success has been majorly influenced by their talisman Lionel Messi's success. If the Argentine forward has a good game, the result is bound to go in Barcelona's favor; however, at times when Messi is not at his best, the whole team looks mediocre.
Such dependence on Messi has adversely affected the club as a single poor performance by La Pulga can derail Barcelona's entire season. This was the case last season when Messi had an off day in Rome due to which the team squandered a 4-1 lead and crashed out of the Champions League quarter-final for a third consecutive time.
Barcelona have great depth in their squad this season with the arrival of Arturo Vidal, Arthur Melo and Malcom but Valverde is still left with the task to work out a game plan wherein the team can perform at the big stage without Messi in order to become genuine contenders for the Champions League title.