>>23565139
kou being able to poke a hole in it is stupid contrivance to end the duel, the shield should also be slathered in beam-resistant coating at a minimum so a beam saber tip can't critically damage it with a single quick poke
that said you might also say that the GP02A was only meant for zoom in and deliver the nuke with its massive thrusters. if it had to stop and duel an enemy MS, either the nuke mission was already complete or failed\aborted already. the GP02A needing to defend itself during its own theft is not something that was planned for in the project and is therefore an edge case.