As a side note though, it looks like it disables PD weapons while active? Those Devastators aren't firing at the Pilums in spite of the missiles being well within range (one actually hits the Invictus), but it's not shooting the Dominator either, and all the weapons have the same 900 range. Even if the bonus doesn't extend PD weapons range as much as non-PD weapons (which would explain why it's not shooting the Dominator), it still isn't shooting down missiles. Maybe it just disables the ability to shoot at missiles for the duration? A bit of give-and-take, perhaps.
My guess would be it only gets the boost or can only fire at targets painted by the system, and the exact boost depends on how many parallel beams hit it.
Nasty against big, not as strong against small.
Also it's yet another ship which will have Heavy ballistics integration. So what's the deal with large ballistics, do they suck, are they too expensive? You wouldn't even dream of a ship with Heavy energy or missile integration since that would be nuts. 3 capitals will have that hullmod, there has to be a reason. You could say it makes for more meaningful decisions with hullmods or other weapons but it honestly just pigeonholes those mounts. You HAVE to use a large weapon there, and leaving it empty is literally a loss of 10 OP.
I think L ballistics by themselves are very good, Ms being better is not the reason.
Dominator doesn't have integration and I don't think you'll see many variants without 2 L ballistics.
Gauss, Devastator and Mjollnir are their own thing with no substitute. Nothing comes close to hellbore in budget anti-armor performance.
Mark IX is basically a straight upgrade to heavy autocannon (+100 range, double hit strength, better accuracy), only 80% extra OP for ~62% extra damage in 1 mount.
HMGs are super good so if you have elite PD storm needler might have some competition, but that's a skill tax and needler still has a range advantage (also constant pressure).
Heph also has some competition in heavy mauler/hellbore, but I was still surprised to see it's generally not considered good. Good turnrate, high projectile speed, decent accuracy, high HE dps. It's all-around solid IMO.
With heavy ballistics integration in play the ships using it can have serious power on all sides.
Removing it and reducing L cost would buff the non-integrated L ships, removing it and increasing OP makes it possible to push offense on 1 side super high and makes knife fight Onslaughts/combo Conquests comparatively worse.
Seems like a thematic consideration, I think it's a good idea.