… accessing special arrows is already pretty easy, on PC at least. Simply click on the icon for your ranged weapon to the right of the character
I have been using this system for sure, but it is not ideal - if my memory serves me well, icon autosorting for this list view is a bit of a mess, and arrows need to be on the hotbar to be displayed in the first place.
Arrows don’t need to be on the hotbar (or at least I’ve tried removing them from the Items hotbar and they still appear in this quasi-quiver view, though I do have them set to auto-add to hotbars generally). And I confess I’ve never felt the lack of better autosorting given the relatively limited number of different arrow types I’ve tended to have at one time, but I can see finding arrows we want getting more problematic as the game progresses and we get more different arrows, or if we build a character around stocking up on special arrows rather than just use ones we happen to find which has tended to be my approach. I guess sorting is a problem that would need to be solved for an enhanced quiver mechanic, too, or at least I personally have no interest in a mechanic where I have to manually add and shuffle around arrows in a quiver.