The point I was stressing on was that to play a fluid and flexible game like they did, you need to develop an unmatched understanding. Cruyff in one single attacking move moved from left back to right back to a center mid and then played the decisive pass, and every single player in the team knew he was going to do what he was going to do and moved accordingly hence never allowing the team getting outnumbered in any area. It is the same with the Barca team, the reason they carry forward in triangles seamlessly is because every single player in the team is aware that at no point should a player be left out of a triangle, as soon as one triangle breaks it is replaced by another, and that is how they move.
Total football is more than having complete footballers in the team who are capable of playing at multiple position. The most important aspect is the team chemistry and understanding. Xavi leaves a pass from a corner, Iniesta doesn't have to wait to see if he is going to do that or not, he knows, and he has already made his move to take the shot. There is no hand sign, no signal, they do it thousand times together everyday and they know how to react every single time. I would suggest you to watch some videos of Barcelona's training and see how Xavi and Iniesta work around each other. It is not because they are world class players only, not because they have an amazing technique and can receive and pass the ball withough wasting an inch and not because they have great intelligence and understanding of the tactics of the game, but most importantly because they can make the team so much greater than the sum of the individuals, that it is unreal.