This is the main advantage from tiki taka. Bayern was also facing the same situation when it was facing a team that can use fully defensive strategy and using counter attack just like when it was facing chelsea and real madrid. barcelona's player only focusing in the ball possession which is not good. The win will not determined by ball possession but it's from how many goals your team can make to win the match against another team. I didn't like a strategy that was putting ball possession as very important thing rather than focusing how to make goal.
I watched first half match between Bayern Munich vs Barcelona on second match day at UEFA Champion League group stage and Barcelona have good performance at first half created many attempt but still not lucky for scoring goals. I think Barcelona games play style always tries how dominance with ball possession and looks slowly when have chance to make counter attack, different with Bayern Munich not trying with how dominance ball possession but how effective when get chance to make counter attack.
Barcelona have bad thing when conceded one or two goals not trying how to play effective for counter attack and scoring goals, but keep try playing ball possession on their defensive area. I think need change about Barcelona player motivate when losing and still have left minutes playing.