It makes me laugh when people say Messi is a better league player and Ronaldo is the better CL player. The better player is better whatever the competition. I know it might be an unpopular opinion, but I do think playing the "Barca way" has contributed to our lack of success in the CL.
The style we play, you will be better most games in the season, but we are always susceptible to a beating than a more well rounded team. If the players aren't the best or on top form, it becomes very difficult to win playing the Barca way. Other teams might not reach the highs we reach and they don't reach the lows we reach. We won 2 CL's in the past decade and I have know doubt we would have won more if it was a European super League format instead of a knockout competition. Some of the years real Madrid won the competition, they didn't even win their group. Once they got into the knockout stages they were always dangerous.
It's also one of the reasons I believe pep has struggled to win a CL with a different team as he shares the same philosophy.