Destiny's separated gun batteries and blind firing arcs

Does Destiny's ventral main armament imply an orbital-bombardment doctrine, or is it poor design?

Poor design in this interpretation: mirrored main and secondary batteries would cover both sides of the hull more effectively.

The fictional ship Destiny carries its main weapon below the hull and its secondary weapons above it. The proposed explanation is poor arrangement rather than a deliberate decision to fight only from a high orbit. Separating the batteries in this way prevents them from covering the same directions. Mirroring both main and secondary weapons above and below the hull is suggested as a better arrangement. Weapon placement determines which batteries can bear on a target from each direction.