One of the major problems I'm seeing in v1.5 (and probably all previous versions) is that ship designs that other players have made are displayed. I consider it a major flaw to be able to see the ship designs of other players.
Not to mention the fact that many players might want to keep their ship designs secret, but it also makes a mess of the user interface. When you go to build or design a ship it is very annoying to have to scroll through an apparently completely unorganized list that can be very, very long (depending on how creative you and your friends are in making ship designs).