My Tuppence worth:
Many no doubt previously covered in the 63 preceding pages, apologies for duplication and lazy failure to read and assimilate all.
1. Gunports should be closed in OW by default: "Clearing for action"; ports opening, guns running out, martial drumming etc could merely be an automated animation consequent on entering combat or it could be a more exciting mechanic, perhaps a button in OW. Running permanently cleared for action might have a negative consequence i.e speed (Survivability, if heavy weather ever implemented) or instead might be limited by the need for a cool down. Failure to clear for action in a timely fashion might have a negative consequence as combat opens i.e. a longer time to a state of gunnery/boarding preparedness which might allow your more alert opponent time for an unopposed broadside.
2. Weather:
i. Storms, variable effect on classes and sizes of ship, the possibility of wreck on an iron bound lee shore, the need to reef or run to a sheltered bay. Yay for danger!
ii.Modelling of randomly generated low/high pressure systems migrating across map with wind direction and speeds following the physics.
3. Some sense of which direction you are pointing the telescope. I would suggest a faint line/sector on the compass display to show the direction of view/camera angle. That means that when you lower the scope and the POV rubber band pings you back to whatever direction you were previously facing you don't immediately lose sight or sense of position on that promising/threatening sail on the horizon. This would also allow players to take approximate fixes on land features to slightly improve guesstronavigation. (Cutting the rubber band might be ok too!)
4.Stars (and planets) by night, and a sextant to use them by.
Thank you for your comments and consideration.