I already see what would happen if group will decide to play pirate nation with the current system and your suggestions implemented.
First they would all start in small/easy nation, get ranks up, farm resources craft ships. Once they done they will turn to pirates.. Nothing much you can do about it unless http://forum.game-labs.net/index.php?/topic/8135-changing-nations/
Or second thing if it happens and other nations will capture all our other ports but MT how pirates supposed to gather resources to rebuild their ships?
Again with the current delivery system you can not hunt for trader ships and i am sure there wont be much pvp for pirates if they all sailing in cutters unless http://forum.game-labs.net/index.php?/topic/7895-tweak-to-the-craftingeconomy-side/( look up for my comment )
Now i don't mind if they make pirates hardcore nation.. but what you suggesting i would say they would be much better to remove pirates at all then .