Masque- this intrigues me. I shall have to reexamine my rule book again. But it still holds out that more guns equal better coverage of the arc. (Also the type of guns used is really helpful. Bb with turbo lasers is just.. ugh. How does that work with slow firing?)
HappyDaze- pretty much, yes. But I would also think that a dorsal-all arc weapon could choose which directions to be a part of, on top of being able to exclude itself, as it can pick and choose.