Dissenting opinion:
While I respect the amount of work being done on this, I do feel something needs to be said. While the Shivans do need their own versions of secondary weapons, I don't think their primaries should be changed too much. Shivans depend on swarms of fighters to get the job done, and their primaries reflect this quite well. If they became as powerful as their GTVA counterparts, it makes it a bit more....unbalanced. Suddenly you would have a horde of ships with weapons just as good or better than their numerically smaller opponents doesn't make for good game balance, IMO.
Personally I also don't think blob turrets should be messed around with. Yes, they suck against shields, but that was really the point. If blob turrets were excellent there would have been no reason to switch to AA beams or flak in FS2. Shivan capital ships (except the Moloch) never had good anti-fighter defences, they always depended on superior numbers of fighters to protect them.
What made the Lucifer so special in FS1 was it's shields and amazingly powerful beam cannons. Its shields made it invincible while it's beams did large amounts of damage with a short cool-down time. It's already a menace, and I don't think its blob turrets really need upgrading.
On the other hand the story and tech descriptions look awesome. Me likes.