I have a number of issues with the balance because lots of ships are just not worth using.
Like buffalo 3, a small carrier, it is a nice idea, but at the end of the day, it is hard downgraded Condor with an even worse logistics profile. It just makes AI fleets weaker, by replacing regular condors quite often and that's it.
Basically the same with Nyx, Expedition, Luddich Eagle and Falcon, I would like to play with them, but they just worsen version and regular ships are just better.
I would say that Nyx should be even cheaper as to what it gives.
Expedition needs massive improvement in the logistics department, like less skeleton crew at least and maybe more cargo. It is subpar as a combat ship, weaker than the Legion and the Legion is not the best, but this would be ok if it would be ok from a logistics perspective.
LC Eagle and Falcon just need more OP, it is quite demotivating to understand that you're left with just 20 OP after just filling all medium ballistics with cheap 10 OP weapons, and this is a cruiser.
Missiles dominator is actually quite good, it is not OP but really provides some fresh approach.