I'd rather see arrow quivers remain, in their own separate inventory. Carpenters already got the sh*t end of the stick as far as profit margins go and consumables are always a good way to give steady income. I prefer some realism even though it's a fantasy game.

As far as magic arrows go, I'd rather see it as a collaboration between Archers and Thaumaturges / Black Mages, while still using normal arrows. Similar to Steiner's Sword Magic in FFIX, a BLM (Vivi) would need to be in the party to perform these actions. A good example is also shown in FFXIV's opening movie (3:00 mark).