With every other spaceborne spoiler receiving an enhanced setting, have you considered adding Enhanced Raiders? I love these little guys because they're the only real justification I have for setting up colonial fleets, STO garrisons and escorted convoys everywhere, which I really enjoy, but they're severely lacking both in quantity and in quality in my game. A minor attack happens every few years, and I only fought a large fleet of them once, decades ago. They never advanced in technology (presumably because I haven't allowed them to salvage much) and their ships, rather squishy to begin with, are now hopelessly outmatched. It would be nice to have an option to increase their production and research rates, as well as give them better-protected designs and boost their general aggressiveness. Another thought that crossed my mind is that as a race of pirates, they really should have the ability to engage in boarding combat, if only for the purpose of scrapping captured ships.
Also, I'm not saying fighters launched from a mothership with thermal reduction engines from hundreds of millions of kilometers away would be very exciting to fight, but that's a very sneaky way to attack someone, and since NPRs are already getting carriers...