maybe a fully dedicated battlecruiser designed from the ground up for missiles? 8 launcher slots, but 3-4 med slots, and 4-5 low slots.
Max speed: 200-220 m/s
slightly weaker tank than your normal battlecruiser, to promote fighting at a range.
Role bonus for Heavy and Heavy Assault missile flight time.
Caldari traits: 5 percent bonus to Heavy and Heavy Assault missiles damage per skill level
Minmatar traits: 5 percent rate of fire to Heavy and Heavy Assault missiles per skill level
Gallente traits: 6 percent bonus to thermal damage from Heavy and Heavy Assault missiles per skill level
Amarr traits: 6 percent bonus to EM damage for Heavy and Heavy Assault missiles per skill level
Gallente and Amarr both future a small drone bay (10-15 m3) to compensate for their lack of missile usage and being locked to one damage type.
Also I heard something about a missile version of the naga so that might still be a thing and would be exactly what your looking for :] maybe in a few months? years xD?
The Drake Navy Issue used to have 8 launchers, all selectable damage types and application bonus. Main missile focus on heavy assault and heavy missiles.
In January she had one launcher removed and the missiles damage bonus increased, just like Lugh said.
And the Drake Navy Issue is the only battlecruiser in EVE that can fly capstable with a mwd on without fitting any cap mods.
Doesn’t get more missiles focussed than that.