I honestly don't understand why there are still no crouch/run toggle modes. I really hate holding buttons for both of these actions.
I also don't understand why can't I double-click an item in the inventory to hold it and am forced to use keyboard to do that. Both mouse buttons do nothing in the inventory (yet they produce a noise SFX, like something is actually being accomplished). It would be much better if all the six options (that are being shown in the floating message when you hover the cursor over an item in the inventory) would actually be clickable with the mouse. For example, pressing RMB could trigger a clickable menu. But instead you HAVE to use use mouse to hover over an item to select it, and then you HAVE to use the keyboard to chose an action. You cannot interact with items in the inventory by only using mouse, or only using the keyboard, you HAVE to use both. Honestly, this is a terrible UI design.