We need more gunly guns, and more content in general.
Pluton Heavy Cannon:
Medium weapon, like a big naval cannon from the age of sail. Long range accurate gun that does primarily armor damage, very slow fire rate. Within 150 meters it is armed and does fire damage, making it much more devastating in close, like a real cannon. Pairs well with Flak at long range, does slightly more DPS to armor than Merc, but at close range does closer to Gat armor damage. Satisfies many roles/requests that I see people wanting. It functions like a heavy merc/gat/flame/hades and the only heavy gun focused on doing armor damage, but really its something unique that nothing quite does yet, but I think it can be made to be balanced and fun. Shot would burn like hades visually with slightly less arc and faster projectile, and would run out of 'fuel' at the 150 meter mark. Makes the Galleon more piratey, and is probably the Goldfish's wet dream.
Vagabond Light Autocannon:
Light weapon, double barrel larger-caliber gatling gun. Medium close range gun with reasonable effectiveness vs armor and hull. No disabling capability this gun is for killing. 6 shots rapidly fire(automatically like gat manti and flame) very small explosion radius, and very quick reload. Called Vagabond because its a 6 shooter
. In the current state of the game, if you want a single gun that can score a kill without a brother, you have to use either a 200 meter gun (flame) or a 1400 meter gun (hades). This closes the gap and gives more options for Goldfish, Squid, back gun on Galleon, front on Junker, and anytime you must rely on a single gun. Should reach out to around 400 meters (680 with lesmok), but accuracy will make it a bit less effective at the edge of the range. Great upward arc like an anti-air cannon.
Phalanx Repeating Rifle:
Like a chain-fed Mercury, you must repeatedly hit components precisely to break them, approx as quickly as Artemis but requires direct hits. Large magazine and slowish fire rate makes it last about as long as a gatling before it runs out, but then has long reload. Secondary damage is explosive with a much more forgiving AOE. My gunners complain that the Scylla is too easy, so this is a rewarding high-skill replacement for a mortar. Scylla gunning on most ships means a lot of waiting. Though more accurate than a mortar, it is worse unless you are breaking components, so it will kill less quickly with a skilled crew, but for new crews the increased accuracy is a blessing. I think this would be a more fun way to kill ships, and there are relatively few guns in the disabler category that can still get a kill.
I have a chart of current weapon stats, and how these new weapons stack up to them, keep in mind that the massive armor damage of the Pluton is only available within flamethrower range, when at long range it does negligible hull, balloon, and guns damage and about 54dps to armor, with consistent hits. I think all 3 of these would have a positive effect on the game, metagame, and amount of fun.
Stuff you can calculate from the chart but I forgot to put in...
Fire rate( not including reload):
Pluton is 2.5 seconds per shot ( 12.5 seconds till empty)
Vagabond is 0.25 seconds a shot (4 shots a second and 1.5 seconds till empty)
Phalanx is .75 seconds per shot ( 15 seconds till empty)