never happen, CPP make it so ship bonus that affect damage application will not affect Heavy missile.
but any ship bonus that increase damage/RoF will affect heavy.

Attack Battle Cruisers are supposed to be for killing battleships. Rapid Heavy Missile Launchers are for killing cruisers. I don't think you're going to get any traction here.

I'm not sure what you're saying. RHMLs wouldn't need a damage application bonus as they already apply their damage better than large turrets. Perhaps you were saying that CCP would never change the Naga to a missile boat? Well it was a missile boat before it was a gun boat so... it could happen.

I bet you want a torp rokh too. Silly caldari.

I'd suspect that not giving any of the ABC's missile slots or bonuses to missiles is a very deliberate choice to prevent them turning into unholy murdermachines capable of butchering any frigate in two volleys with a rack of 8 bonused RLM's.

High speed, moderate tank, and then a full rack of damage, range, or application boosted missiles on a Naga would make it your one stop shop for reducing a frig fleet to scared hiding in safespots.

And that would be bad how exactly?

This is reflected in the bonuses towards large turret weapons, but no bonuses towards other weapons sizes.
Naga has no general hybrid bonuses, it has Large Hybrid Turret bonuses.

As such, then permitting them to use specialized anti-frig or cruiser attack options like RLML's, or RHML's would be a drastic departure from the original stated intent of the ships, it would also be the only ship in the game with excellent fitting options for dealing with any ship class. Something CCP does not like at all.

But they are designed for combat against smaller ships, whereas ABC are designed to combat larger ships.

Btw the Torp Naga got canned because it ripped apart capitals and BS like there was no tomorrow, the first incarnation of the ship was OP beyond repair.

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Like it or not, rapid heavy launchers are classified as a large weapon. While they have better damage application this is really no different than using Dual-250mm or 350mm hybrids instead of the 425mm version to achieve better tracking.

A: Naga would be the only non BS+ hull in the game capable of fitting them. This is not a good situation.

B: Naga can of course fit smaller unbonused guns to gain better tracking. So can the Oracle, the Tornado, and the Talos.
They are garbage because they have no bonuses and are slapped on a BC hull, but you can fit them. Go ahead if you feel the need to have anti small ship weapons outweighs the need to do decent DPS. But don't expect the large weapon bonuses to work on them.

No non BS can fit RHML's, or Torps, mainly because they are such powerful weapon systems that permitting their use on damage bonused agile BC hulls would be insane.

The low tank and restrictions to guns means that ABC's are vulnerable to close range rapid orbit ships like interceptors, and this is a very important part of the balancing for them. You don't get to strap on 800+ DPS of anti frig/cruiser weaponry that does not require tracking and stroll of into the sunset on your winmobile.

Especially since none of the other ABC's could fit them.

A. Not true. Gnosis and Prophecy can fit 2-3 RHMLs.
B. Also not true. Dual 250mm and 350mm guns receive the same bonuses on the Naga and Talos.

A: At 1200+ grid per launcher, GL getting more than 2 on there,

A: At 1200+ grid per launcher, GL getting more than 2 on there, even with several fitting mods. Only one without fitting mods, and it's entirely unbonused for a grand total of 88 DPS on a Gnosis. Fitting one or two useless unbonused oversized weapons on one hull is a terrible argument for being able to fit 8 bonused launchers on a same sized hull.
This sort of argument only hurts your own case.

B: And they are both Large Hybrid Guns. Note the emphasis? They are not missiles, and while they are better at tracking than 425's, that does not make them specialized anti-cruiser/frig weapons like Rapid Missiles.

A. Run the numbers - you can fit 3 RHMLs on a Gnosis quite easily. And you're incorrect, as the Gnosis gets a +25% damage bonus to heavy missiles - so that's equivalent to 4 RHMLs. My point was not that you should or that it's advisable, but merely that you can.

B. Rapid heavy launchers are HEAVY missile weapons. Note the emphasis? And would you please stop referring to RHMLs as "anti-frigate" weapons? No one in their right mind uses heavy missiles against frigates.

C. If you want to talk about an anti-frigate missile platform, may I direct you to a RLML-equipped Drake?

A: At 1200+ grid per launcher, GL getting more than 2 on there, even with several fitting mods. Only one without fitting mods, and it's entirely unbonused for a grand total of 88 DPS on a Gnosis. Fitting one or two useless unbonused oversized weapons on one hull is a terrible argument for being able to fit 8 bonused launchers on a same sized hull.
This sort of argument only hurts your own case.

B: And they are both Large Hybrid Guns. Note the emphasis? They are not missiles, and while they are better at tracking than 425's, that does not make them specialized anti-cruiser/frig weapons like Rapid Missiles.

Drake could use kin damage bonus to rapid lights...

There are no other non-BS ship beside Tornado that can equip Large projectile Turret, same for Energy weapon with Oracle so what is exactly your argument here?

in fact, if we change Naga to Missile, Talos would be only non BS ship that can equip large Hybrid.

There are no other non-BS ship beside Tornado that can equip Large projectile Turret, same for Energy weapon with Oracle so what is exactly your argument here?

in fact, if we change Naga to Missile, Talos would be only non BS ship that can equip large Hybrid.

B. Rapid heavy launchers are HEAVY missile weapons. Note the emphasis? And would you please stop referring to RHMLs as "anti-frigate" weapons? No one in their right mind uses heavy missiles against frigates.

C. If you want to talk about an anti-frigate missile platform, may I direct you to a RLML-equipped Drake?

And I see no problem with that. In fact, the Naga is somewhat of an anomaly considering the dominant nature of missiles in Caldari ships.

Lets suppose that Naga gets a 5% per level damage bonus to these RHML's. Probably a decent assumption. Let's also assume that it get's no bonuses to explosion velocity, explosion radius, or missile velocity. (probably unlikely)

8 launchers * 1.25 = 10 effective launchers.

Now can anyone guess how well a 10 effective launcher Naga packing Precision missiles while using one or more TP's and 2 Rigor Catalysts + a Flare Catalyst will do against non interceptor Frigates? A good benchmark is roughly 700 DPS with Precisions for such a ship using a double BCS fit.

The answer is damn well. Interceptors will still kite it easily, but a good interceptor can kite Warrior II's, so that's a bad benchmark.
Anything less is liekly to be chewed up and spat out in short order.

If it's not a Frig, load Fury and unload 900-1k DPS of tracking immune missiles into the cruiser, reducing it to wreckage in short order.

TLDR: RHML's can be be very potent against frigs and cruisers as long as the naga fits a TP and application rigs.