It would be good old footy from before the 90s...
Clashes of different football cultures. So to compete in Europe, you will have to integrate different styles with your players, and not players' styles in the team.
Example of a team who just had players with different styles playing together... The Real Madrid with Zidane, Figo, Beckham, Roberto Carlos, Raul, Ronaldo... So many stars, yet such confusing football...