Inventory QOL:
-a way to quickly drop all of a stack onto a counter, rather than the default "how many?" pop-up. Maybe ctrl+click/drag, or something?
-probably much more involved to do: a way to select multiple stacks in your inventory and move them all at once
-sort options for inventory, e.g. by "recently used/picked up," "category" (food/equipment/material, for example), "weight"
-user-defined nickname or tag for items/stacks in inventory. (For example, if I have 3 pieces of paper with stuff written, but they're all different, a way to tell them apart at a glance. Could also be good for differently-branded coins, etc) I imagine this being visible only to the one who defined it, again as QOL not as a gameplay mechanic or roleplay device