Dear Nikolo, I love samurai wars. It’s a good game. It would be a great game if you changed a few mechanics to be more realistic. Here is my proposal for some tweaks that could help with that:
Limited ammo (50?) and stamina, as others have mentioned.
Spear cav should be shock units which are not as badly outclassed by spear infantry as saber cav, and that do a lot of damage when they make impact, but very little as a melee continues, not cav with a slight defensive advantage.
Infantry, perhaps except ranged and especially polearm and spear infantry should be able to stop other units from going right through them.
Archers should have a better chance of hitting running horses. Maybe let them use direct fire when up close?
Horse archers should be able to shoot and run at the same time. I know they are already OP but limiting ammo and stamina will nerf them.
Thanks for reading this!