First off I'm loving everything I'm seeing about three kingdoms. There's just one suggestion that could probably be used across a range of your Total War projects. I know that now is a time when the devs are cracking down on bugs getting the game ready for launch. This is just a suggestion for the future.
Projectile trails are one of those things that I love because I can see where the archers are shooting, and without them it can be harder to manage my archers. But sometimes they seem a bit too pronounced. It'd be nice if there was a slider to scale the projectiles or if we could pick between say small, medium, large so that the player has a bit more customization on how they'd like it to look.