Since 2011, the only two times (hopefully) when we won a CL (2015 and let's hope 2019), we won when we DIDN'T PLAY Barca's way.
In fact, we gave away possession and we didn't attack like crazy.
In all other seasons, when we played like a classical Barca, we lost to counterattacking teams with less possession (Atletico, Atletico, Juve, Roma and almost Psg).
Also interesting, Pep's teams Bayern and City, who play the closest to Barca, lost every single time, mostly to clubs who played with less possession, less naive too attacking high line and with more deadly counters.
Again, we don't need to play THIS way in La Liga and against minor opponents.
But for Champions league and World cups, this is currently the simplest and the most efficient way how to win titles.
Ironically, you have a higher chance to win if you play more cautious instead of playing in a too attacking (and naive way), leaving tons of space for counters behind your back.
Basically a team which allows:
1. less counters
2. and which makes less mistakes around your own box
= win CLs
Again, ironically, Pep's football and classical Barca's style is inviting both:
1. counters against you when you lose a possession with 10 players around the opponent's box
2. and mistakes around you box with forcing players to always keep a possession and never kick the ball upfield far from your box