How long is it likely going to take to be introduced into the game if it is still planned to be there?
I have an idea about war system, what if loser country become vassal country? And they must pay approximately 30% tax to winner country. Vassal country can send his army to help his liege if they are on battle, but vassal can ask his liege for help improving his country, for example repairing Crysthaven or Sinasoka village.
I know many players want conquering other country land, but of course ruler of loser country will be dethrone or being executed on conquer mode. I don't want dethrone Chiyo sisters, Queen Varea and Queen Apelia.
This is just my idea, the decision is up to you :)
and for how the war mood gameplay may be make the battles use the same battle system on the map were you should fight a number of battles on the enemy nation on the world map in your castle maybe even before every battle the player have to choose from same strategic chooses, those chooses will either gave you bonus on the battle or make your army weaker