I suggest you make the game More Realistic, More Elaborate, and More Explicit.
For exemple, you create cold areas where soldiers die while out of food (just like it happened twice in Russia).
For exemple, you create some buildings where our soldiers can have... some fun... (I mean sex)
For exemple, you create a new feature to infiltrate the castle of others (to place a spy who will sabotage the castle from the inside).
For exemple, you create a new feature to intercept the raids of others.
For exemple, you create a new feature to make the soldiers pillage the peasants while out of food.
In my opinion, there was a principle for the armies at this epoque : move forward or fall.
I suggest you decrease the amount of units we can send in reinforcements.
There are a lot of lags in the game...
In my opinion, you should stop creating new games, and focus on one only game.