So I've done close to a full playthrough with this mod, and I have to say that it's still not very balanced after the last patch.
My biggest problem with the mod is that the added ships feel like they have no weaknesses. Many ships have strong shields, absurd levels of armor, strong hulls, damage boosting systems, lots of weapon slots, maneuverability, and speed. Missiles track targets indefinitely while dealing large amounts of damage and being shot in large numbers and being fast enough to track a Scarab, which makes them more threatening than Reapers even at their optimal distance. Fighters are too tough due to having both shields a lot of armor/hull while being able to deal absurd amounts of damage, especially through missile barrages, which some of them have multiple of by the way, unlike vanilla fighters and bombers that have to come back to the carrier to replenish theirs. Many of the carriers also have strong frontal weapons and good maneuverability which are things that carriers are meant to lack. Phase ships either have too much flux capacity, due to which they can stay phased much longer than they should reasonably be allowed to.
Comparing them to the [REDACTED], the [REDACTED] don't have strong fighters/interceptors or bombers since they die quite fast, many of their ships don't have good burst damage, many of them don't have good enough maneuverability, mobility, and tankiness to get out of dangerous situations, most of their systems only improve survivability and mobility slightly (like the flare launcher on the brilliant). Hiver ships have very few, if any, of those weaknesses.
In my current game, I'm playing with ScalarTech ships which are able to reliably enough destroy Hiver fleets since the ships are balanced well enough around the stronger vanilla ships, but I don't even know if killing Hive fleets would be possible while playing as a weaker faction like Diable Avionics where ships rely on grinding out the enemy, fragile strike craft, and burst damage high-cost weapons because of the high shield and armor/hull values, hull regeneration, and high density of fire + strong point defense weapons.
The idea of the mod is cool and I have definitely enjoyed trying to come up with strategies against them, but I don't think I'll be using this mod in my next playthroughs because the Hivers' fleets ultimately just aren't fun to play against