Small players can be powerful; look at Dennis Wise. Big guys can be technical; look at Didier Drogba. A good player is a good player, period. Pep is kind of luncky though, no disputing his talent at managing (he is one of the best) but he got lucky at Barça given that his team was already technicaly gifted. For instance if he had inherited the the AC Milan team of 2008, I believe he would have struggled getting his philosophy and name on the map. And he is terrible in the transfer market.