Well, seems strange to me that with 3 lowest possible ships, can control all mediterranean, because nobody build a ship, costing too much in building and upkeep costs.
All strategy guide around, says to destroy any ship you have, at the start, because cost too much.

I hated the vanilla Rw where fleet of factions and pirates spawn all around, and attack everything, but this is other way around, nobody own a single ship, seems.

I dont know if you will extend the sea trade and sea warfare, but i think will be a nice add.

Well, that was my 2 cents opinion.

Good work. bye