This has probably been stated several times before, but this is my first time here, so bear with me.
League gives you the option to see top scorers, top assisters and best players, this is just a detail, but as a game designer, I can't state how important competitive statistics are to player engagement.
It would be very nice to have those available in Cup and Champions as well.
Ps: Check every decent web dedicated to football, and it will have those three data analysis along position and fixture for leagues, cups and tournaments..