Such a popular but neglected game mode, EA need to sort it out next year and actually add more to it.
Couple ideas is more customization. regarding team kits, stadiums, tifos, player style/appearance.
Online training sessions. Basically the same concept as skill games but every member of the team can play in a session and choose certain training games to play.
Online Tournaments: Champions league?
Better defaults or the ability to purchase players for your team. The more you rank up the better players you can get.
In game tactics/substitutions.
Any more idea's?