Currently it kind of breaks my immersion, personally, to constantly be stumbling across magic arrows on the corpse of every basic, weak goblin archer, if they don't fire all three of their standard magic arrows before they get killed.
I feel like what's missing is the requirement of a tinkering check that goes higher for the more powerful arrows, making it inaccessible to low int/low level characters and thus, rarer as a whole in the early game.
For example, the acid arrow that lowers AC by a whopping 2 (!!!) is incredibly strong on large bosses that tend to stand their ground and hit stuff. Especially since the area remains for such a long time, it's basically a permanent -2 to AC (it won me the spider matriarch fight), and anybody can get that effect! Which to me seems crazy.
