Caladbolg

Here's an idea of balancing. I'm not saying it's perfect.

Nerf BC's broadside, lasers to 50% of current dmg

Nerf BC's shield to regenerate 50% (0.5S/5GW) and 50 shield per 5GW

Nerf Kinetic to 50% of current dmg vs shield, 75% vs hull

Pimp BC's engine to have 125% of current speed

Increase cost of BC upgrades. (150-200%)

Nerf Corvettes dmg vs shields to 50%

Increase the number of small ships increases, maybe mutually exclusives for each ships or upgrade trees. Or add downside to upgrades

This would move the spotlight to small ships, it would also allow the use of small ships during BC fight to be more effective due to shields being weaker and BC dmg output lower. BC shield nerf and weapon balances themselves out, only the hull is twice as effective (except against Kinetic) It would make BC fights longer, allowing Small ships to again have a higher impact during a fight.

Why BC engine speed? because maybe, just maybe it would allow roaming with the BC to be possible. It might remove the BC doesn't move until kerm or final attack stigma.

the Increase cost of BC upgrades but not small ships pushes the game again toward the SS strategy, at least making it more viable.

Wraith

Hull upgrade +50 hp, -5% speed. More hull on your wraith means bulkier, slowing you down. Thrusters upgrade +15% speed, +1 energy consumption. Stronger engine, more power needed. Power Upgrade +1 energy +50 to maximum energy storage. Weapon upgrade +20% dmg -5% velocity (okay, that one is just...)