Could the opening of boxes be more automatic?
So instead of pressing E twice to get an item, it could automatically pickup it up with only pressing E once? (so press E and it will open the box and give you the item instead of opening it, and then pressing E again to pick it up)
It's just kinda tedious to want to pick up an item and having to press it twice. Maybe the item obtained could also use a different animation to show you what item you got from it, since if you spam E to pick up items you don't really know what item you got until you open your inventory.