Let me save my preferred difficulty settings, to make it less of a hassle to start a new game
I have a particular combination of difficulty settings that I happen to like. A lot.
They correspond mostly to Captain, but with a few tweaks to make the game easier, and a few other tweaks to make the game harder (or rather, to feel more realistic to me).
And starting a new game is such a hassle, because the game doesn't let me re-create them in any easy way, such as with a menu button during an on-going game that says "Restart Map", which is something I use in other games to start over on the same map and with the SAME difficulty settings.
So at the very least, let me make a local "save file" of my preferred custom difficulty settings, as a 4th option next to Sailor, Captain and Admiral.
And as a more advanced option, compact the particularly chosen combination into a short alphanumeric string, preferably something that's a bit easy to remember, such as 2 letters, 2 numbers, 1 letter, so people can share strings.