I like how the mod plays, but in my tests I do not see a measurable gameplay difference between 0 (accuracy + marksmanship bonus) and 35 (accuracy + marksmanship bonus). I'm really asking if you're open to playing with accuracy (spread) in the future to differentiate between high and low quality units. I realize to really implement this like I am imagining, you would need to create new weapons/projectiles with different stats, and have one set say for low quality archers and the other for elite archers. That way arrows from elite archers always hit the target, but ones from cheap archers sometimes miss even if the target is standing still. At this point, the only difference between elite archers and cheap archers is reload speed and defense.
I realize that something like this is not a big priority, especially as long as you are working on the west, but I wanted to pick your mind to see if you were open to implementing this kind of specialization in the future. There are factions and areas where a little more differentiation would probably be welcome.
Edit: I don't see any decrease to accuracy in your mod files. I see you increased the effect of experience drastically, which means theoretically my archers should be even more accurate than in vanilla.