Isn't it concerning to you that so little of the fighter's mass is in weapons?
The size 8 box launcher is only 60 tons out of the 445 ton craft. This seems to suggest to me that it isn't very efficient in terms of the fire power it can bring for its production cost.
When you are trying to fit stuff into <500 ton package at low tech levels you do have to make a lot of odd sacrifices. To get decent speed you must be able to build up a lot of the tonnage to build a functional ship first, then think about weapons.
For example, here is the same concept at the next generation of engine tech.
Old one with upgraded missile
Swordfish class Fighter-bomber 445 tons 11 Crew 47.8 BP TCS 8.9 TH 20 EM 0
2247 km/s Armour 1-5 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 1 PPV 1.2
Maint Life 43.02 Years MSP 67 AFR 1% IFR 0% 1YR 0 5YR 1 Max Repair 12 MSP
Intended Deployment Time: 1 months Spare Berths 4
Magazine 8
Sims Cybernetics 10 EP Nuclear Thermal Engine (2) Power 10 Fuel Use 98% Signature 10 Exp 10%
Fuel Capacity 10 000 Litres Range 4.1 billion km (21 days at full power)
Lane Aeronautical Size 8 Box Launcher (1) Missile Size 8 Hangar Reload 60 minutes MF Reload 10 hours
Burke-Daniels Missile Fire Control FC18-R100 (1) Range 18.0m km Resolution 100
Torpedo Mk 2 (1) Speed: 9 400 km/s End: 33.1m Range: 18.7m km WH: 12 Size: 8 TH: 34/20/10
Missile to hit chances are vs targets moving at 3000 km/s, 5000 km/s and 10,000 km/s
This design is classed as a Fighter for production, combat and maintenance purposes
and the upgraded swordfish
Swordfish Mk 2 class Cruiser 460 tons 11 Crew 61.3 BP TCS 9.2 TH 40 EM 0
4347 km/s Armour 1-5 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 1 PPV 1.2
Maint Life 41.12 Years MSP 83 AFR 1% IFR 0% 1YR 0 5YR 1 Max Repair 12 MSP
Intended Deployment Time: 2 months Spare Berths 0
Magazine 8
Short-Lawrence Aerospace 20 EP Nuclear Pulse Engine (fighter) (2) Power 20 Fuel Use 136.96% Signature 20 Exp 12%
Fuel Capacity 20 000 Litres Range 5.7 billion km (15 days at full power)
Lane Aeronautical Size 8 Box Launcher (1) Missile Size 8 Hangar Reload 60 minutes MF Reload 10 hours
Burke-Daniels Missile Fire Control FC18-R100 (1) Range 18.0m km Resolution 100
This design is classed as a Fighter for production, combat and maintenance purposes
you are almost at 400 tons already with just the small fuel tank, engines, and a fire control.
These are not going to be super useful with the exception that there small size means they can many times approach a target without being detected. I could use a FAC but that uses up a shipyard while many times you have fighter plants idle for years in a conventional start.