Concept: Move some Hullmods from individual application to fleetwide. Some hullmods work best if they're applied to every ship, or almost every ship, because they represent a commitment to a particular playstyle, and I think it'd be neat to formalize that by having a slot for a bonus that applies to your entire fleet. A button you can push to easily shift from "We're wandering around looking at planets" to "It is time to invade the Hegemony"
Examples:
Insulated Engines: Either you're on a stealth mission or you're not.
Solar Shielding: I want *all* my ships to survive reckless hyperspace travel
Augmented Drives??: This one is fine as is but would also make sense to choose "fast" in lieu of travelling quietly or safely
Improved Sensors/Survey/Salvage: As above