Are there any realism settings that should be taken OUT of Realistic Game Mode so that less people have to revert back to Arcade?
Now that's difficult to say, for I really don't understand why anyone would use the Arcade mode at all
But I can guess of course ...
I think it is mainly because of ship's speed and handling. I think, who plays in arcae mode is just too impatient for real sailing speed and ship handling, and would be much happier with a motorboat-game rather than this. But, he may be fascinated by pirates, so he wants to have pirates speeding around in motorboat-fast vessels that look like cool pirate ships.
But if this is so, it does not help, because we shall not take realistic ship behaviour and sailing speed out of realistic mode just to make more people play it, because then those who like realistic mode will go.
But perhaps there might be a trick. It is used by at least one other age of sails game, that is PotbS. The sailing model there is similar to ours here, means different ship types have different good and bad sailing points, and they won't sail directly into the wind (well, in fact, they can sail directly into the wind there, but at such a slow speed, that it doesn't make any sense doing so ... different from our arcade mode).
But - they use a fixed and strong wind speed all the time. So, wind changes direction, but never ever it's decent speed. Thus, ships will always move possibly fast when just sailing into the right direction. There is no calm in that game.
But I am really not sure if I would like to have that here ... because I very recently had an interesting battle in which a calm played a certain role. So, even a calm can add to fun in the game, at least for me. Not always, only on very rare occasion, but it can.