Full Game Logging Replay
I wish the entire game was logged play-by-play and could replayed so you could see exactly what each player did with their turn.
Obviously you can decipher much of the game from the current log, but there are many failed attacks that you can't be certain of EXACTLY what happened and how many armies were lost in some battles unless you have have a computer in your head to decode the log or spend 20 minutes studying the log.
An animated replay from you last turn to current turn (or the entire game) would make it much easier to plan strategy and fun to watch I think.
B!