It might sound hard from my mouth of an uninformed person, but I found Barca looked lazy in the first 30min.
Not willing to run (like thinking, I will have to be able to run till the 90th minute, so I better do not run after balls I could get, if I run really fast).
Or some were "thinking" to long about the next step. There was one scene were Song were up front and was like (I am not used to being here, what shall I do?). Or Fabgregaz getting a pass and thinking "you told me you would play there, shall I run one meter and try to give the ball back to another player or try to score from the right side? No, I wait and then I decide to run after the ball though, well it doesn't matter that it's 3m away now and if I would have run immediately I would have easily got it. Oh, to late. We will get other chances."
There were playing less "hesitant" later, but still thinking "we do not want to adapt. We will play like we always do and if Neuer knows, that we all shoot the ball very near to the ground and through the middle, we even more play that several times again."
Also it looked rediculous, when any Barca player was running with the ball, it was often like Bayern Players would just have to wait till they tun besides them and very gently tip the foot against the ball.