One of the main issues with it is the slow that is applied. The slow affects the entire block space, and not only when touching the thin barbed wire section. This was quite easily exploited and was being used in a fashion that was not intended.
Originally posted by Bane of Kree: yeah leave it to modders to make the game better. lol
No, they aren't making the game "better". They're assisting you to make the game the way you want it. The Fun Pimps will design the game the way they want it to be, with the challenges they intend for the game to have.
You should feel lucky that they support modding as much as they do, and have opened up nearly every aspect of the game to be changed at your leisure.