i think he means the ION cannon, which is intended to disable systems with an EMP type effect. I dont know if it actually works anymore. We are having trouble with effects being invisible at the moment though, this may have been affected too.
The TIE bomber used in EFH is different from the one in Taloraan. In EFH, it indeed shoots bombs downward. In Taloraan, it switches to Ion Pulse warheads (the projectile goes slower than the tracer, so aim them as if you were aiming your proton torpedoes).