I would love to be able to park all my out grown but much loved ships into my lagoon in my house. That way my friends can tour my ships and I can tour theirs. This will really open up things when hopefully, someday we can decorate our parked ships as little theme island type things to have parties on.
I think this has been mentioned before somewhere, but I like this idea. I have sold off my outdated ships mainly for the confusion in the select ship. I would have loved to do this and would like to be able to do it with my younger pirates.
I think this would be cool, but even if KI does not add it there is kind of an alternative. It's kind of like the Sunken Palace in W101, right? I would love to be able to place items on my ship!
You can unbottle ships at your house (well I don't know about other houses but I can at my Volcano Island) but you can't place items, you can only have one ship out at a time, and its still in the sky, not floating in the water like you said.