It would be nice if they did add it.
Maybe there's be super-powerful arrows that require relatively rare ingredients, so one could only craft a relatively small number of them. But they'd be saved for special moments when you're taking down the big boys

Think the Black Arrow from
The Hobbit, though not so much unique as simply rare.
Of course, inevitably someone would find a way to exploit the system, and everyone would be carrying a quiver of 1000 Ebony-Gold Arrows :/