Hybrid mounts is not a good enough reason for Centurion when it can only point two at enemies, and ballistics are generally better than energy unless you want EMP. Because enemies are constantly kiting now, Centurion does not have time to point three guns at enemies (when it is already difficult enough to do) and keep up with them. The best Centurion can do is keep firing two railguns at small ships while constantly advancing, never giving the enemy the chance to lower shields, vent, and recover. Despite less damage to armor, constant long-range kinetic pressure is perhaps the easiest way for Centurion to kill frigates.