Oh good grief. I'm afraid your post sums up some of the levels of cluelessness spouted on this thread, forum etc
If you think Pep didn't have a plan to deal with their pace, you have not paid attention. The problem Pep and every manager faces is that a perfectly good plan can be fouled up by 11 guys failing to execute it properly.
Again, you've not been paying attention if you don't spot the number of times Pep adjust things, for example at HT, and resolves problems that appeared in the game. Yesterday was a case in point: City have much better control of their counter attacks in the second half, that may have been in part the Rags sitting more on their lead but I'm sure it was also down to corrections Pep made to his team.