For ships that can stern turn, I assume that rotation “sweeps” across the playing surface? (and the ship needs a clear path, rather than getting picked up and placed, though the Code mentions the latter under Moving)
The stern turn is written as just a rotation, so you do not get to pick up the ship like with a normal segment. You aren’t able to rotate through things, unless there’s enough clear space to rotate entirely around it in the opposite direction.
Also, do you think the Home Island Raider ability should have been handled differently? Similar to boarding parties, I don’t think it should be the loser’s choice – either have the winner choose, or make it a random coin. Of course, if the winner chooses, then they get to see all the coins on the enemy HI (in multiplayer at least), which can be a big information advantage too.
I think it was designed/written with the standard two-player rules in mind, where all treasure would be face up and visible on home islands, and when played like that it would work fine to let the raider choose what to take. But, like you said, Multiplayer (or two playing using the MP rules) is where it breaks, and why it gets put under the general rule where the person losing the item chooses. Being able to look at everything there could be way too powerful, and would slow the game down if the player using it had to stop and look through/count up everything instead just taking the first good coin they find.
Something in between might be good, where the HI owner would have to reveal a certain number of coins (4 or 5?) and then the raider could pick from those. Maybe with the added restriction that all of the values shown had to be different (if possible), so you couldn’t just flip a bunch of 1s and 2s.