[AgentZero]

Components that increase the abilities of other components. ie:
Shield Booster: Increases shield generation by x%
High Energy Focus: Increases energy weapon damage by x%
Recycling Plant: Increases supply by x%

Another thing I'd like to see, which is something I've modded into my own SE4 game is that Base Space Yards have a higher construction rate than Planetary ones, however they can only be built onto Bases. Ships can carry Space Yards, but they have a significantly lower construction rate. This makes sense to me, since I would think that it'd be easier for a massive starbase to construct new ships than it would be for a planetary facility. The only thing I'm having trouble modding is that I want the Baseship to be able to carry a Base Space Yard.

Certain ships should have 'inherent abilities'. At the moment, I don't use many of the specialized hulls (ie: carriers, transports, colony ships) because of the restrictions on their construction. So, I suggest that these hulls have a certain advantages to outweigh the restrictions.
ie:
Colony Ships: Provide 10M colonists. So by using the colony ship hull instead of a LC or something, you basically get 10M 'free' population for your new colony. This would have to be coded so you only get the free 10M when creating a new colony, otherwise it'd be too easy to build loads of colonizers and fill a planet with free population.

Transports/Carriers: Get 50% extra cargo space per Cargo component. This way, a Transport/Carrier with 10 Cargo comps each with a capacity of 100kT would get 1500kT instead. Thus, using a Transport/Carrier hull would be more beneficial than using a 'normal' warship hull.