(I might have made this post on Steam before, but I have since refined these ideas into something I think is much more coherent and implementable)
With the item bags, the current inventory system feels rather unnecessarily fiddly. 4th inventory slot isn't a real slot because you have to have free hands for ship items. But if you're looting an area, that slot gets filled with salvage and then you have to clear it by putting your item bag on the ground and adding the item from the 4th slot in. On top of that, I've felt like consumables don't see any meaningful use because of the fiddling aspect and because a weapon usually beats a consumable when it comes to usefulness-per-slot ratio, plus the natural tendency to hoard and conserve displayed by even the average player really puts a damper on the system's engagement. Same thing is gonna happen to grenades, too. Additionally, I have some ideas for improving the item bags. So allow me to share them.
(There are quite a few suggestions and I can't fit them within the character limit, so I must post them in the comments)