Mini game to destroy the anchor is a cool idea but would require a specific tool which would need lots of mats and one time use only. The idea to take a ship needs to be planned, not one of random happenstance. Would also need to build a replacement anchor for after you have stolen it or you yourself cant anchor. I would still want a tier system as they kind of have now for after anchor goes down but reduced times. Potentially taking a galleon with a full crew in 30 mins is a bit quick unless it only applies towards ships at sea in combat, that would be a new fun take on how ship combat works. Also like the idea of selling stolen ships but would have to go to a specific island, same as we have free ports.... maybe make one of the islands in the grid a black market district.
This needs to be a thing, all of if. The Diving attachment gets blown off EVERY fight with it having 100 hp. Try to use it as intended to go salvage ships, especially your own if something happens, and can't get down to it (let alone back) without being swarmed by mobs. No way of defending yourself and forced to resign as all your work for the entire day just disappears.