Most RPG Systems that use success have the first success deal the base injury of a weapon, with additional success increasing that base injury by usually one. If I am understanding the RAW correctly, EotE always adds the number of net successes to the injury dealt, so the minimum injury that can be inflicted is the BASE INJURY + 1.
This seems inelegant to me somehow. Did this come up during the Beta? Did the developers explain why they went this way with the system?