Clan emblems as a customisation toggle would be nice to see, as many have mentioned.
Also, I thought of a way to print ship names. At the moment, you can buy or unlock inks to paint your balloon and to recolour any emblem. Keep the balloon colour as the primary paint, and add ship name as a secondary. With the default clear paint, nothing would be visible, but if you choose to spend an ink you can add the name onto the side of your ship.
Also, a theme that hangs fluffy dice above the helm would be great. Thanks.