What if there was a third option for crossbow bolts: A small-capacity quiver for hybrid classes? Something with 4-6 bolts, Maybe a little more damage than plain bolts, cost about the same or more than steel bolts, and 0 slots?
You could carry a Crossbow, 1H wep, and 2 slot shield with the 0 slot bolts. Or a 2 slot 2H or polearm with a 1 slot shield.
It would have to be balanced around throwing, which fills a similar roll.