[Jarena]

I really like this idea (especially the hull bonuses for ship types, I think that's really cool)
The one thing I'd like to see in this mod is a reworking of the ship construction tech tree. The SEV demo one didn't make sense to me. Instead I propose expanding the theoretical aspect of ship design, as such:
Theoretical: Ship Construction L1
leads to
Applied: Frigate Construction
Applied: Colony Ship Construction
Applied: Light Freighter Construction
Theoretical: Ship Construction L2
leads to
Applied: Destroyer Construction
and so on and so forth

This way, one's ship hulls can adapt to play style. You can strike out for the DN quickly, but you'll have small expensive hulls. Or you can take the slow progression and have cheap efficient hulls as you work your way up. You can even specialize (big carriers and fast destroyers, say)

This could be applied to the fighter tree as well:
Theoretical: Strikecraft (or somethingng)
leads to
Applied: Carrier Hulls
Applied: Fighter Hulls
(where, say,: L1 = SFighter I
L2 = Sfighter II
L3 = Sfighter III, Mfighter I, and so on and so forth)

This, again, conforms to your playing style
Lowtech carrier + hitech fighters vs the opposite gives you:
A smaller number of powerful fighters (X-Wings?)
vs a huge number of cheap throwaway fighters (TIE fighters?)

Drones and troops, I think, could be kept like stock SEV, because they don't have dedicated deployment methods like carriers - unless, say, you added in a dropship class? (fast troop transports with +armor and +pd?)

As a last thought, would you ramp up the hull special bonuses? IE Destroyer I would give, say +1 speed, whereas Destroyer IV gives +4? Might be a way to keep smaller hulls valuable and researched late-game.