I personally don't know and don't have the time to learn how to mod this game, but I would really love to see a mod that disables the bloodsucker "knock down" special attack. It would also help to remove their scream attack that messes with your sensitivity too. This would make bloodsuckers like in the original trilogy. Instead of screaming and giving away their location, then fighting you with brute force, they'd use their invisibility to be effective. Just like they were intended to be in the original trilogy.