The main problem is, and has always been, hammer heads are a bit squishy. So why not bring a Sunder instead? Or get a Medusa/Manticore and not really worry about survivability. The Enforcer has the same issue. It's not survivable enough for end game fleets.
So you're saying to cut out ships that can't survive... and replace them with the least defensive destroyer?
Sunder is a massive cheap beatstick, it's not a survival-based escort.
Nope. For smaller ships, range and maneuverability are the primary dictators of survivability in end game fleets. Sunder survivability is better than a hammerhead in most situations do to having significantly higher range. Sunders don't escort capital ships. Capital ships escort Sunders. BTW, this is also why Manticores are considered viable in end game fleets while Enforcers aren't. Manticores have 900/1200 range base due to the large ballistic mount.
I'm also saying Sunder has a place in end game fleets due to being one of the top ships in the finisher role, despite it having the durability of a wet tissue. If you're going to baby something, baby something that is the best at what it does. The hammerhead isn't the best at anything.
Which circles back to this thread's topic. The Hammerhead needs something more to be compelling to be used end game fleets. Either a survivability tweak (range/maneuverability), or something else that is unique to hammerheads that make it compelling to bring as part of a fully kitted out fleet. And that something shouldn't disrupt the early game balance. My current thought after typing all this out is built in ECM or Nav Relay. That seems midline-ish? This won't affect early game much, but it might be compelling enough for players to use a line of Hammerheads in end game fleets. And now that I typed that out, perhaps a step further? How about instead of an existing hullmod, it gets a new built in hullmod that reduces the OP cost of ECM, Nav Relay, ECCM, and High Resolution Sensors? This gives the ship something unique and compelling to players, and it's very easy to be calibrated when balancing as there's a lot of flex room in how much it reduces the OP cost of those hullmods.
Since we mentioned the Enforcer needing more reason to be used in end game fleets earlier, I think built in Blast Doors might be a direction to go. I think the ship is already a strong choice for trash fleets. If it's nonredeemable in survivability, then recoverability could be a vector for desirability.
I forgot the Shrike exists. It's issue is that it's best role, as a hunter-killer, doesn't do much for it. Hunter-Killer role is better performed by a Fury or Aurora. Which may save it? Perhaps it has it's place in end wolfpack fleets? It has 10 burn speed. Perhaps all it needs is a model size reduction of 20%? I don't know. It doesn't seem to have a place in traditional big ship anchor or line fleets. It obviously designed as a smaller Fury, but unlikely the Fury, doesn't have the flux to handle a Heavy Blaster. One time it did, then HB got nerfed to cost more flux.
As a side point, if AI gets fixed to use Burn Drives, Plasma Drives, and other such systems as escape methods, it'd go a long way to solving the Enforcer and Shrike survivability problems.