As it is, ranged combat is just something you hardly see outside of hunting, and even less in PvP, except for taking out still-standing dudes out of reach. I want to see a dual-crossbow-wielding badass taking out full platoons of fighters!
First of all, a greater variety of ranged weapons would be a welcome change; there would be two categories, ammunition-based and thrown. These should be self-explanatory, ammunition shoots stuff, with thrown you throw the weapon, but you can have a stack of them so you don't end up spending q90 steel on a one-use weapon.
Next, instead of the stand-still-and-aim mechanic currently implemented, rather the aim bar would essentially become your attack bar, which would be effected by how mobile your target is (how much they're moving), and their agility, and your defense would be replaced by dodge because if you use ranged equipment, aka light armor, you won't be wanting to absorb the blunt-end of a devastating blow.
In addition you have a whole new set of moves and maneuvers, such as "Eagle Eye" which greatly restores aim, but requires you to stand still for a second, leaving you vulnerable to a follow-up attack. Or in the case of maneuvers, you have "Careful Aim" wherein you move slower and your attack/aim meter fills up faster, and "Quick Reflexes", increasing your chance to dodge, but lowering your chance to hit.
Of course, I don't have every little thing plotted out, and I'm sure there's a big hole in my idea I didn't see coming, so what do you guys think?