How about being able to resize the window without having to switch resolutions in the options, like dragging the lower right corner? Is that in any way doable?

Also temporary deformation of the bodyparts (jelly-like) when hit with a lot of force. This would make the ragdolls seem less... steel-y, more alive. Then again, that might not have been your intention in the first place.

Also a live texture preview. Like when you move files called "head.tga" or something in a specific folder and enter a specific ingame mode, the texture gets instantly previewed on a naked tori.