A customisable battle formation for players will be more effective.
Customisable in sense each player should have an option,
Atleast one to create a default formation of their troops which will be automatically used for troop moments untill attack command is given.
This way game feels more involving and players will able to control more effectively.
For example just imagine being able to have spearman as a front wall in the shape
Archers behind them and horseman along with seige engines covering flanks
This way the battle can actually endure longer duration
Unlike present games where just troops are poured to fight to death