If your car keeps breaking down, you've changed one part and it carries on breaking down, do you keep changing the same part, blaming it on that, or could it be something else? A tactic that has been successful, won't just suddenly fail because it's the second season.
Remember that this tactic needs a very certain set of players. A lot of the bigger clubs couldn't use this without having to sell a lot of star players. Chelsea - Fabregas, Hazard, Schurrle, Willian. Arsenal - Ozil, Walcott, Ox, Carzola, Alexis. Man City - Nasri, Silva, Navas. Liverpool - Coutinho, Lallana, Markovic, Sterling. You get the idea!
Wing backs need a lot of stamina, they run more than anybody in the league. They also need half decent finishing, they get chances. All 3 midfielders and the dlf also need stamina, as they run a lot.