I'd like to see a new element for wars.
Allow a rally battle element where up to ten individuals can join a battle where units can be selected to fight against another individual.
The defender can call for reinforcements (up to 9 max) to join him/her in defending his selected army.
Units can be lost in battle. This way, players can be brought down, teamwork will be a huge requirement and no matter how big you are, you must be able to rally allies to defend and outfit your army to counter the attackers army.