One thing that's always irked me is that it feels like they made "Low-Tech" and "High-Tech" equal in battle strength. Technology should simply improve things so it feels off when higher tech isn't something to strive for.
"Low-Tech" isn't "Primitive-Tech." Lore-wise starsector has a spectrum:
-Improvised and salvaged ships, like pather and pirate ships. These ones are truly "primitive" or at the very least, "daring." The equivalent of strapping a howitzer onto the back of a toyota and calling it a day.
-Low-tech classes that are obsolete like the Invictus, which were developed for combat conditions at their time with the best tech available at the time. No shields, lots of armour, low speed, low flux weapons, high crew count e.t.c.
Notably none of the Invictus's problems would have been a problem for humanity in the era where the space gates were still active. This progresses with the Hegemony dominating the galaxy with a high focus on heavy capital ships dueling with heavy capital ships, leading to the birth of the Onslaught, or experiments on heavy capital ships capable of operating in all theatres without support - the battlecarrier being the first real foray into adopting strike fighters.
-The midline divergence occurs around about here, with the midline rebels taking a look at the battlecarrier and the Hegemony's heavy cruisers and thinking "what if we thinned the armour and upgunned it." This is where we start seeing stuff like Eagle light cruisers, Gryphon missile cruisers and the Conquest battlecruiser. It's noteworthy here that Hegemony ships still slaughter midline ships in a head-on duel, but the midline rebels try to tackle the Hegemony's dominance by fielding faster, smaller fleets. So neither side's ships are superior tech wise per se, but they are designed to fulfil different combat roles.
-Tri-Tach develops the high tech fleet here, alongside the AI fleets. More flux capacity, energy-based weapons, more shield-coverage, more automated systems (less crew), more "experimental" tech like teleportation and phase drives, leading to fully automated ships. Notably this also makes for more delicate ships, and with a lot of the "high tech" coming from the automation and not necessarily any weapons or flux systems. A good example would be the derelict ships which date from this era - already inferior to their contemporaries at the time they were built, they were built nonetheless because the Hegemony did not lack for industrial might and it saw no problem with sending massed waves of AI ships to attack rebels.
-Collapse of the gate system. First AI war. Second AI war. Legendary XIV battlegroup arrives and
wins. Current Hegemony continues slimming down the armour of their ships to make them slightly faster to better deal with Tri-tach wolfpacks whilst still being more up-armoured and up-gunned than Persean midline ships. But the low-tech, midline and high-tech are all seeing continuous development parallel to each other. The only difference is by this point low-tech doctrine is based around heavy armour, flux-efficient weapons with high crew (reduce use of automation) and unmatched frontal firepower. Midline is based around speed, devastating broadsides, missiles and carrier actions. High tech is based on minimally crewed, experimental weapon systems like phase drives, EMP arc emitters, fortress shields, AI-core usage e.t.c. but sophistication does not always equal superiority. Just different philosophy
You know, there's one glaring flaw with the AI and that's its tendency to run away from ships needing support.
I had a ship getting flanked, and two more ships within range to help. Their decision making was to, despite having full armour and no flux, run as far away as possible.
Of course, the instant the ship got destroyed they then charged in to kill the flankers. I can only assume the captain of the dead ship owed the other captains money or something and never paid it back.
A good way to control fleets and get them to support one another is to set a waypoint and mark it as "defend." This will group up the ships, and even when they scatter due to enemy intrusion they will stay close to the waypoint with supporting fire arcs. And if there are too many enemy ships in the area you can always delete the waypoint without spending a command point