Wow, this is quite an impressive ship! For just coming out of your dark ages, I'm amazed!
Technically speaking, there was only one thing that stood out to me......that the ship has 4 masts. It just looks a little odd to me, because 4 masts make the deck look a little cramped in a ship of this size. In my opinion, it would look better if you kept the foremast in place, shifted the mainmast back about 8 studs or so (1/2 way between it and the 3rd mast), and then shifted the 3rd mast back a bit, while adding a mizzen sail (thus making it the mizzenmast). I think it would just look a bit more normal, since most ships had 2 or 3 masts. This is just my personal opinion, so don't take it too seriously!
Otherwise, I think you have done a great job, and I love your attention to detail, especially with the full interior of the ship. I'll be waiting for more updates!