Thought about it before. Could have the player need to time when you release the shot which would add some skill to ranged. Don't think you can do slings properly in the engine though..can't even do flowing capes that don't stick to legs, won't be able to do swinging slings
If it uses the same game mechanics as throwing/xbows then its kind of pointless as they are easily the most generic/shittiest game mechanics in the mod, don't need more similar things