So i took the mod out for a spin, here's my 2 cents:
1: The models look great, and i can't wait to see what they look like with textures
2: The torpedoes are great, strong but not overpowered.
3: The lances should behave more like their Tachyon counterparts in vanilla, with a lower rate of fire (about 10 seconds to reload?) and high explosive damage.
4: The macrocannon projectiles are too fast and too accurate, and the rate of fire should be lower. Right now basically all Macrocannon shots hit their target. I'd double their damage and halve their Rate of Fire.
5: I feel like Imperial ships should have much higher fuel and supply capacities given their sheer size.
6: The deployment cost of Imperial ships is too low, the Retribution and Emperor should be at least as expensive as the Paragon.
So, that's all i've discovered so far, i wish you the best in the future, and thank you for bringing 40k (back) into Starsector.
PS: I forgot to add this one, but the Emperor has 8 macrocannon slots per broadside, instead of 4. Speaking of macrocannons, i think Battleships should get bigger macrocannons (Corvettes and Battleships using the same caliber is very weird)