Basically, fans knew better than Pep the team that should have played? I very much doubt it.
This overthinking stuff is blown out of proportion and is a daft and tiring cliché now. Fans should accept that nothing guarantees success in a single game, especially in a CL final. People notice Pep's "experiments" only when they fail. They forget that Pep won the league with 100 pts by experimenting with a midfielder at LB, and then beat Liverpool to the title with another midfielder at LB, and then won another title by experimenting with Gundogan at false 9. If fans were told before the start of the season that Pep would try to win the league with Gundogan as a false 9, they'd have said that's the silliest thing they have ever heard. But the silliest thing worked to perfection! Pep's been experimenting all the time. Pep would be a flop if he wasn't Pep.
All this nonsense about Pep overthinking things should stop. It's embarrassing now.