Well in the case of torpedoes, I think that the technology over thirty years or so would make them a wee bit more advanced (i.e., more damage, maybe a slightly better turn rate, better range). Right now they've become useless if you can land on a base that has a Nova Cannon or Mini Razor...perhaps maybe one day, the Sunslayer will live up to its name again?
As for the Primary, Secondary, and Tertiary capital ship turret idea, I'm fully in favour of it.