I hate that dice rotate too long. 2 Seconds I think that was enough. I would have liked to see clearly the result of the battle and not disappear as soon as it appeared. I think it was better if the player can decide when to stop the rotation of the dice by clicking on a button. So he decided the outcome and not the game.
I played the second game of the series Medieval Wars 2 days ago. I like the idea of the game and I think you could work on the 3 rd game to include improvements. My suggestions would be: finding artifacts to make soldiers stronger, weakness of certain categories of troops in front of others (Spearman effective against light cavalry for example), medals, option to join troops on the battlefield in specific points to form stronger groups of soldiers, dice could remain as a factor to calculate the final outcome of battles (lucky / unlucky depending on the outcome of the dice) as an outcome favorable to dice could turn a fight that seemed lost or could cause large losses for the enemy, you could enter the option to build walls in flat areas, defense towers, catapults and rams ... Success!