I've always thought a space for players to type a few short in-game notes would be very, very handy. You may not get to make your move in a game for days and a bit of strategy that you cunningly devised on your last turn may be forgotten or just plain missed when you come back for your next turn.
I play on a chess site that has this feature and it makes the need to completely reassess the situation every time you log in unnecessary, saving time, aggravation and points in the long run.
Thanks for the consideration.