After leveling a character to near max and playing two of the three classes I had some ideas to improve gameplay experience and tune some of the systems.
Revamp professions system: Do not make professions a onetime selection instead make them three unique paths which can be trained and require resource and time investment to craft or heal well. This will still encourage teamwork because you can't invest in all three well at once therefore requiring your crew to split roles. However, it will create more end game content to grind for and prevent needless balancing of the professions (Locking content to a specific profession).
Reputation Gain Level Req: Similar to the update which prevents power leveling there should be a required level for players to gain fame. Currently end game is just running around murdering every lowbee in sight so you can get a coat. The early experience with end game players now around 3 days in will be bad enough, don't incentivize mass murdering them. Include additional daily/weekly actives to grind rep as well.
Sailing: Don't waste development time on boat battles, it will likely not work well. Making sailing an Oregon trail style random event driven experience that takes your and a limited number of crew from island to island. The system should include matchmaking with other sailing crews as a random event, as well as storms that take you to somewhere you didnt intend, NPC raiders, etc.