Honestly I could be for this. I was a Ranger in XI and a Bard/Archer in XIV and I have to say that the constant cost of arrows over other classes is absolutely absurd. If a quiver item was added that was equip-able to replace consumable arrows, it would still need to be crafted and could be the replacement to arrows. Again, higher initial cost, but also other benefits.

Quivers could add stats other than just additional damage and if you consider status arrows or elemental arrows, it could also allow for more than two DoH to contribute to their creation. Which adds a different boost to the economy. It would also allow for the potential to make +1s and maybe even make them meldable, thus increasing the materia economy.

So it goes without saying, that there could be great potential in something like this, though it would cause a temporary slump as DoH adjust to making these instead of arrows.