Player Interaction -
-Resovling issues between players who dislike eachother
-Training more detailed individual moves(random example: tell a CB if he's ever the last man, never go hard in)
-Making a tutoring option that let's youngsters learn something from players with different personality(i.e.. tutoring that isn't as close)
-Convincing players to accept going on loan deals(i.e. being able to tell them you really think it will help their development etc.)
-Talking with player who are dirty(/aggressive and forcing them to change their ways
-Discussing with player about how they feel they can perform if retrained to a new position
-Having team-building events, rally meets(to boost morale)
-Increasing the role of the captain somehow
-Discussing with the players about the upcoming match(their input, maybe one of your boys has played in the opposing club and can share something)
-Being able to give players more ultimatums in regards to their performance, especially if it's a player you can't/won't sell(a 6.9 average in 20 matches, mate?)
-Being able to sit down and have a serious discussion with players that dislike you, and maybe repair the relationship or atleast build a bridge.
-Commending players for good training efforts without having to tell them they're not training hard enough first.
I saw someone mention this earlier but I want to be able to:
-Set up training sessions somewhat like in real life instead of sliders. Where you can choose between different training procedures and having more talented coaches will open up more/different ways to train. This will make training specific positions easier instead of vague sliders(example: Now, if you want a nible little winger to improve his stamina, he has to train a strength regime. If you want a huge, strong rock in defense, he has to train aerobic to improve his jumping).
-Train specific moves for specific situations(set pieces, etc)(PS: Not just like the match preparation stuff which is just hidden stat boosts, i mean real, specific movement)
-Being able to join/watch trainings, to spur on extra effort, or maybe be able to watch 5-a-side matches to judge who you should use in the next match
-Goalkeepers being able to learn brazilian side-kicks PPM or something to give the goalkeepers that are expert kickers(in terms of accuracy) an edge.
Other stuff -
-Being able to be a club teams U-19/reserve side coach. It would be fun to have a sort of semi-guided career mode where you have goals and objectives.
-Hosting trail games to attract youth so YOU can choose which youths should be signed.
-Having the oppertunity to comment on the ref or other match related stuff outside the normal after-match press conferance.
-Goalkeepers getting their own Penalty Saves stat!
-Captains(and other high influence players) getting more animations where they spur on teammates, direct players, point etc.(to a higher degree than in the current FM game)