As I appreciate the updates towards voyage quality. I would love to see some bigger changes revolving around already available mechanics that I think would be lovely additions to the already awesome game we know as SOT.
Additional player activated events, similar to the Fort of the Damned. Additional ways to spend money; examples below. Since the rare spawn mechanic exists (Ancient skeleton) you could think about adding some rare spawning monsters that spawn a rare chest similar to chest of rage/sorrows rarity.

Gold Spending:
Pirate Legend perks:
Spend money to purchase an empty storage crate.
NPC in the pirate hideout sells limited pineapples.
Customize ship with a “Glow” for in game money each session

Idea) Hunters Flag :
150k each time to raise the flag
LVL UP : By Sink others ships / Defeating World Events - Bonus for sinking Emissary (Esp Reapers to promote helping trading companies from the reapers company)
Seen on map (blue)
Needs to reach level 5 to sell loot
Sell loot in exchange for tokens
Exclusive Hunters cosmetics/titles for tokens
Optional : Shows Emissary brief locations (1 ship in Ashen area)

Arena:

Make a dedicated map with 5 islands, one on each corner and a fort in the middle (chest delivery) with cannons.
This could be good for a capture the flag type of game.
Brig arena 2v2v2.