I think alot of people here are still confusing terms around "posession football". Its not about having the most posession you can by passing the ball around and not attacking directly and penetrating...like Bayern did today... or like Barca has been doing for a while now.. its about attacking and about pressuring the opposing team like crazy after losing the ball... and the side product of this is more posession. Thats how Barca played at its peak few years ago, not like we play today and certainly not like Bayern plays.
At least some people are keeping a clear and rational mind.
Barça system is not about possession, but about using the most effective tool in modern football (possession) to achieve tactical aims, of course to be effective, possession football needs some requirements (intelligent mouvements and positioning, tempo variation, combination game, actions trigers relatively to the offensive animation), without these elements, the possession based football becomes unidimentional and thus very predictable, this is what happened to Bayern and Barça (the last 3 seasons).