Taking into consideration the size of the bomber, the SNAC is overpowered. Imo. The only reason the SNAC packs the power it does is to level the playing field against capships. People who are unwilling to pilot a capship for one reason or another want to be able to wield some devastating firepower on their own terms. The SNAC gives them that opportunity.
The game engine doesn't take overall energy consumption into account. We "know" that all ships have a finite energy supply. They burn fuel and use energy-based weapons. Fortunately, gameplay overrides reality in this situation.
If the game engine could take the energy consumption factor into account, a bomber would probably be able to fire the SNAC three times. After that the ship would be floating in space, without power. But this is just my speculation.
I wonder what would happen if the next mod converted the SNAC into a munitions-based weapon system, with the same stats but with some slight tracking ability? Would there be more or fewer bomber pilots?