A) Ironweaver Cannon: Sounds fantastic, shards are such a fun line of weaponry to use.
B) Sunstorm PDE: Tri-barreled sunstorm sounds like a rockingly good time - but why not go for both? An assault and support variation - one for dueling capitals and another for long range support.
C) Linear Pulse Battery: This sounds deliciously evil for frigates and destroyers with large mounts that have hit and run playstyles (Desdinova comes to mind as something that'd benefit enormously from a LPB pattern)
D) Quill Battery: More high ammo missile weapons are always appreciated!
For your finisher MRM, you could go with something like a Sunflare that has an HE aoe explosion so it deals a devastating amount of damage to multiple armor sections (BRDY techs point two sunfire emitters at each other inside a munitions case, are not disappointed with results).
YES, MORE WEAPON TYPES, MORE! It's nice to have a good selection of weapons for your ships - especially on ones that are either slot limited or OP limited. I'd love to see some higher OP version BRDY variants as well, the most you've got is 9 OP for small ballistic, 8 for small energy, 6 for small missile, 13 for med ballistic, 15 for med energy, 15 for med missile, and 25 for large ballistic.