I think a great improvement to the inventory system would be to have smaller hand hitbox/ smaller area to auto lock onto items to pick up.
I, like many others, am a hoarder. If I see something of value, it goes in the bag.
I normally can deal with organising by placing things on top of each other in certain categories. For example - anything being sold when I get back goes in the top right, all meshed together.
I try to put rounds into boxes as I find each of them. This often means little groups of rounds in separated, but close, areas. When I find a box I then drop them in.
I also place ammunition for me weapons on the middle left, healing on the top left and food on the bottom left.
My issue is that the auto lock means it can be very hard to grab what I am trying to grab. I reach for a box of ammo on the middle left, and my hand picks up a syringe that is right up in the top left corner. The centre of the syringe is not the closest item to my hand and is not what my hand is pointing at. I can only assume the hitbox of my hand is too big, and the hitbox of the syringe is too big, or maybe there is some kind of priority system for what is grabbed.
Either way, I think smaller hitboxes for items and hands would be a good quality of life improvement to inventory management.