Edit: Updated designs as I didn't see that Holo-Fields are 2 System Slots for capitals.
Preliminary refit proposal for our Caravel and Carrack hulls, chose to use tree species for our cruiser names since we're using bushes for our escorts.
[] Saccharum class Light Cruiser (8 System | 4 Weapon Batteries | 1 Heavy Weapon Battery)
-[] 1x Heavy Graviton Thruster Lance -1 Heavy Weapon Slot
-[] 2x Macro-Suncannon Weapon Batteries - 2 Weapon Slots
-[] 1x Heavy Torpedo Launcher - 1 Weapon Slot
-[] Trade 1x Weapon Slot for 1x System Slot
-[] 1x Suncannon PD -1 System Slot
-[] 3x Æthersail - 3 System slots
-[] 1x Holo-Field - 2 System Slots
-[] 1x Grav-Shield - 3 System Slots
The Caravel is pretty straightforward, the Heavy Grav-Thruster lets it hit above it's weight class against heavier ships while the Heavy torpedo battery brings some much needed torpedo capabilities to our fleet.
Given the fact that we have ~73 of these things that should that should help beef up our torpedo capabilities until we get a torpedo boat escort designed.
[] Velutina class Cruiser (8 System | 6 Weapon Batteries | 2 Heavy Weapon Battery)
-[] 1x Gravetic Amplifier Chieorovile -1 Heavy Weapon Slot
-[] 1x Macro-Imploder Chieorovile -1 Heavy Weapon Slot
-[] 3x Fatetwister Cannon Weapon Batteries -3 Weapon Slots
-[] Trade 3x Weapon Slots for 3x System Slots
-[] 1x Suncannon PD - 1 System Slot
-[] 4x Æthersail - 4 System slot
-[] 1x Holo-Field - 2 System Slots
-[] 1x Grav-Shield - 3 System Slots
-[] 1x Hangar - 1 System Slot
For the Carrack I figured we could drop the Heavy Starlance battery for a Heavy Grav-Imploder and Grav-Amplifier combo while keeping the 3 Fatetwister batteries and invest the remaining slots into more survivability features.
The logic for retaining the Fatetwisters comes from the fact that the main gimmick of Starlances is their raw power while Fatetwisters are a bit more esoteric with their unerring accuracy and ability to directly target the weakspots of enemy ships.
As we saw during the second Meros fleet action the Fatetwisters were able to directly target the specific parts of Ork ships (IRC there was a QM quote about Fatetwisters being able to go straight for engines). Given our kiting oriented doctrine the ability to potentially mobility kill any unshielded ship with Fatetwisters by having them specifically go for the engines synergizes massively with such a doctrine.
Great black spears of Wraithbone, cruelly barbed and bladed and visible only when they ever-so-briefly occlude some distant star, twist in impossible corkscrews and serpentines, impaling escorts or lesser Roks that vanish in tremendous fireballs seconds after impact, the Fatetwister Cannons finding their marks in ammunition-bunkers or volatile power-generators.
The loss of the Starlance's raw power meanwhile can be somewhat mitigated by using a combination of an Amplifier and Imploder as that combo is noted for its extreme raw power but we don't really have anything that can do the same things as a Fatetwister.
The largest forms of Combi-Gravs, these terrifying weapons can threaten even Titans or Voidships with being crushed to nothing under grav-fields so powerful they can resemble small singularities (though they are not truly so), though their cost is comeasurately great.
Given we have 54 Carracks to refit we can't really afford to change to Fatesever PD as those will cost much more than the existing Fatesheer CIWB (64 Psy-Scopes). Even just going by Escort PD gun count (60 guns) a single Fatesever PD (2 Psy-Scopes per gun) should cost 120 Psy-Scopes at a bare minimum and given the fact that the Fatesheer CIWB (4 Psy-Scopes per gun) had 16 guns to the Ketch CIWB's 10 guns we will likely see a similar increase in PD gun count (~96 guns) for the Carrack.
Having an hangar for each of our Carracks would give us a significant increase in our strikecraft capacity as our only strikecraft carriers at the moment are our Brigs which only have a single hangar.
Once all the Carracks have been refit we will have increased our strikecraft capacity by more than 3x our current capacity.