This would be super awesome actually! Since the most important stuff in this game is the ships in my opinion it would be awesome to have a fleet comprised of different types. Especially different kinds of ships that are actually purposed towards a specific task. Since they added in trading, commerce is obviously something they want to be apart of the game so having ships tailored towards that shouldn't be that big of a stretch. As for the Man-o-war...who doesn't want more cannons?