Isylwin, I appreciate your every effort and look forward to see you honing your skills to acid-raining skies. 
Yes, I have suggestions too. 
I won’t bother you much with hand crossbows, even though them thingies are very useful - but CBMs somehow make them obsolete. I do wanna point out multishot and rapidshot to you, as they are as common in games as overlaping chassis’ in CataDDA. Precise shot is another thing, considering how the game handles how you actually hurt a foe.
Multishot could be a high-skill feature, allowing one to swipe up to three enemies in one swoop, or place two arrow-shots in close-range combat. Both scenarios suffer from a mild DMG penalty but To Hit Chance remains intact. It goes something like this, and you’re the lucky one that gets to be the judge:
Archery Skill - Multi Shot
lvl6 - two arrows, same enemy, base dmg halved
lvl7 - two arrows, same enemy, base dmg 75% / two arrows, two enemies, base dmg halved
lvl8 - two arrows, same enemy, base dmg 90% / three arrows, three enemies, base dmg 75%
lvl9 - two arrows, same enemy, full dmg / three arrows, three enemies, base dmg 90%
lvl10 - as above, but Multi Shots attack take as much time as ordinary ones if the player has Rapid Shot
*base dmg counts as projectile’s dmg ratio, not armor pierce, and not weapon’s bonus/penalty
Archery Skill - Rapid Shot
lvl3 has -2/-4
lvl4 has -2/-2
lvl5 has -1/-2
lvl6 has --/-2
lvl7 has --/-2/-2
lvl8 has --/-1/-2
lvl9 has --/–/-2
lvl10 has --/–/-1
*requirement for lvl7 archery Rapid Shot with 3 arrows is DEX 12 and PER 10, otherwise:
lvl7 has --/-1 and penalty for To Hit rolls isn’t lowered furthermore
If you had time, you could look into Cripple Shot and such; I’m not a great fan of Stun Shot, but you could ommit one’s movement in similar manner. Again - living, breathing things can be harmed by projectiles in numerous ways, but it’s really up to coder guys to say if the moose is bleeding or not and whether its crippled limbs slowly lead to death or not.
Hope you’ll get lucky with this. 