I agree that would be pretty awesome. I know a lot of times with my guild or friends when I go to their ships all the deck cannons are taken so its just me standing around. I think it would be awesome that you could run below deck and man a cannon that way as well.
I also agree with what was said before..we could all keep our "personal effects" such as clothes, jewerly, etc in the Cabin of our ships. So when you want to go change you could just go there to do so then go back ashore
