Maybe I'm just overlooking something obvious, but as I understand it, we're supposed to have choices to make between beam weapons, missiles, and mass drivers / guns. Similarly, a choice between shields, armor, and point defenses.
But as I'm playing the campaign, all I get for choices when building ships are beam weapons (lasers, etc) and armor. Nor do I see anything on the tech tree that mentions shields, missiles, etc. As I said - am I overlooking something obvious? Or do I have a massively messed up installation?