My first thought was: "Neat! More options to customize ships." =)
My next thought was... almost everyone will buy the anti-gun armor since most people comes up against guns more than missiles. Then nothing's customized, everyone will have the same stuff.
Then everyone will NEED to have the same stuff, for PvP.
Maybe, maybe not.
I'm not crazy about the idea of adding MORE armor/shielding/protection, cause it just makes it harder & harder to kill someone (PvP or against NPCs).