If we are adding a hi-tech freighter/hauler, why not make it resupply ships that improve the logistics of your fleet? With the high-tech ships able to provide a logistics experience far above what your average private admiral enjoys, the bonuses to fleet quality should be reflected in improved CR, and lower maintenance costs.
Here's a few rough ideas for ships in the hi-tech freighter category, more to see how their hullmods work/interact.
Destroyer size:
Rainier class supply ship
- Essentially an uptech'd Mule in general hull profile with increased shields but loses the medium universal for two small universal mounts.
- Uses a flare launcher as System.
- Built in hullmod: Logistics Center: Increases Combat Readiness by 5% per ship (max 20%).
Cruiser size:
Hayasui class fleet supply ship
- Similar profile to a slower Heron, retaining the two fighter bays but losing the medium universal for 2x small universal mounts. Has a lot more cargo space and fuel space.
- Uses Maneuvering Jets as System.
- Built in hullmod: Combat Resupply System - increases the peak performance time of ships in the fleet (+50/40/35/30% based on hull size).
- Rapidly diminishing returns when multiple are involved, and the resupply ships need to deploy to have the bonus take effect.
Capital size:
Benevolent class fleet repair ship
- Kind of like an Astral, but has only 2 fighter bays and no large missiles (medium missiles instead) but this results in having vastly more cargo space.
- Built in hullmod: Maintenance Drone System - decreases maintenance supply costs by 10% across the fleet (does not stack). Decreases repair supply consumption by 15% (same supply cost though).