I wouldn't mind any kind of fluff changes, but not really for any that would effect the player long term (such as training bonuses etc etc). The moral stuff, while it's not long term, is kind of covered in the salary anyways (it auto gives bonuses). I guess I wouldn't mind say "night on the town" to give a boost to starting moral, rather than just a moral "reserve" like the salary gives
some fluff ones that would be good:
-Change color of AEQ / EQ for ____ dollars (not slot, just color) potentially even buying special colors that are only obtainable via player cash
-Highlight Reel - Allowing you to buy a "season highlights" box on your players page, that could potentially auto populate with top plays, or you could manually put them in.
-Press Conference - Hypes the player up and increases his chance slightly to receive an endorsement
-Trophy Box - A player trophy box that's on the player page, that can be decorated etc via cash to show of the trophies he's earned