May I share with you my thoughts on this idea?
As a filthy casual player who left after the mega patch on may 2017 (or something like that), I just came back a month ago with one of my friends to give this beautiful game a second chance.
During that month, we grinded in order to be able to craft ourselves SoL. In fact, we are about to craft our firsts Santissima and L'Ocean this weekend. My point is that it took us more than a month to be able to get there, even after buying the DLC that grants more building slots... For us, casual players, SoL still are something unique that we don't want to lose! If the idea is to make SoL rare even for hardcore players who can play countless hours a day, it then means that the idea is indirectly to make it impossible for casual players to sail those ships.
And please, don't tell me I can just join a big clan, simply because I don't want to involve myself too much in the game. I don't want to have to log in at a specified time to do a PB. I mean, for me, it's a video game, not an alternate life. I respect those who play a lot, making the community of this game awesome, but for me, it's just not what I want.
Making SoL harder to get, by making them more expensive or by raising their maintenance cost, isn't what I would call a good idea for the casual players on the verge of giving up. I mean, I don't have the time and energy to grind (let say 5 hours) to be able to sail my ship once in a while.
I get the idea that the majority of you wants to reduce their numbers in OW and RVR to make the game more realistic. You're actually right! On the other hand, I don't think this game is intended to be realistic. I mean, what the f*** is Russia or Poland (and many other) nations doing in the Carribeans anyway? If you want to make the game realistic, make it realistic all the way.
If, by reading this, you are telling yourself "P*** off, you sh***! Leave the game and stop crying, we don't care!", then you're not helping the game keeping it's population high enough so that some PVP can happen. I mean, there's other options. Some good ones have been shared, like buffing upgrades, etc.
Thank you, and sorry for my bad toungue.