haha that is funny that his assistant's name is Pep :D
I am sure that if you want to continue the same play style you will need a similar coach, but you dont knwo how the game will evolve. Many thought that (original) Pep's TikiTaka is unbeatable, but once the players got older the football shifted towards other systems and styles. While Gegenpressing is very efficient right now, football will certainly evolve again :)