They need to delete the Sniper and the Blunderbuss.
The Sniper feels horrible scoped (without a DPI macro) and it just takes the fun out a Sword-Pistol fight if you have a mate pinging people from the crow's nest. There's something exciting about two people firing a pistol off and then going at it with swords.
The Blunderbuss just straight up SUCKS for deck fights--especially on a Sloop. The small fight area just means that no other gun will come close to rivalling it. I know people can change weapons easily in the cabin, but even having a one-shot mechanic in such a jovial and relaxed game just seems bizarre.
The pistol is fine. Even a scope-less rifle with a longer reload time and lower short-range damage would be fine. But getting one-shot by a blunderbuss when the game mechanics feel so loose is going to frustrate a lot of people.
Make fights about pistols and swords and cannons. It's a bit slower, more tactical, and more piratey.