You can argue formations and tactics till the cows come home. What I saw last night was Real Madrid players that were a level above their opposition. O'Reilly and Guehi were like children learning how to swim, in shark infested waters. Khusanov versus Vinicius jr was is a laughable mis-match. Listen, when you buy players from Palace, Wolves, Bournemouth and Usbekistan. Don't expect them to rock up to the Bernabeu and play like prime Barcelona. Pep's a good manager, but he's not THAT good.
I'm not sure what has happened with the transfer policy, because it looks like a stockpile of players that like to finish and stick the ball in the back of the net, but not much good at all the other stuff, like tackling, tracking back, creating chances for teammates. Getting involved in the general play, making a few short passes, playing 1-2's, running into space or playing as a team. It's me me me football.