http://bleacherreport.com/articles/1652135-5-reasons-barcelona-could-still-struggle-in-201314-even-with-messi-and-neymar

Too much to copy and paste, sorry :/

the main reason for me is tito vilanova : Useless coach, Roura same thing. if we win something next year, all the merit will return to players. His performance against Bayern is just poor.
poor tactic matches : against Celtic, 1st Leg agaisnt Milan,all Clasico's of this year, 2 games against Psg, and of course Bayern.
he is just lucky to have Messi in this team who scored in la liga this year 46 goals ( more goals scored than 15 liga teams).