I know it's early but whilst I have the ideas in my head, I thought I'd put it to you
Also, Happy New Year!
Ok, so training for me could be improved a hell of a lot. I was thinking maybe of training reports after every session so you get an idea on who is training well, who is lazy as well as maybe players health improving or not. Also, maybe you could focus on certain things based on your tactic or your upcoming games. Which ties in with my other idea.
Better feedback from scouts on next opposition. Key players, passing, where they are likely to attack from. Set pieces and so on. This info could be used in training then so you prepare for a game.
IE, your scout tells you they prefer to play wide and whip the balls in quickly. You could then drill your players to watch for that.
In real life, a lot of matches are won by preparing and training and yet in the game, it feels like a part of the game that is automated to a degree and holds little value.