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.