I know BH will most likely never get an upgrade, but I think this would be a nice simple addition that would make the game a little bit better.
Have you ever wished you could have a portal chest in a custom world? I wish that all the time, especially because they can be 16x and your BH’s can be very far apart. So, I think portal chests should be split into two items. The universal portal chest that would be exactly the same as the current portal chest, and the portal chest which would only be able to move stuff around in the world that you made it in. So you could have it in a custom world.