Maybe these things could be fun for the game.
We could add the feature of a young team. At the end of the season the youth school ads one or two new young players to your team. The quality of the new players depends of luck and the lvl of the youth school. Every coach can train the new players to strengthen the team or sell them.

Whit an training camp trainers can send the team away for the one to tree days. If the players come back they have some training point. The amount of points depends of luck and the money you spend on the camp. This also can be used in the season. In this case an assisted will train the team and play the games while you are on vacation.
Thx for reading