Same old story I guess. Against team that having same quality or more, where Pep prioritize midfield to contain opposition, they just lost the cutting edge in attack (already not optimal without a true prolific forward). Not able to score goal, would let your opposition (here are teams with serious quality), getting used and more comfortable. With their quality just a few chances would be enough for them to punish the high line defense.
Cry us a river really. Have time and resource to sort thing out all this time, but too obsessed with his view of perfect game to act on it. Getting the same control of the game like his Barcelona midfield is unfeasible. Ending up shooting in his own foot by neglecting the forward position.