When copying buildings including the Antenna 2, the copy will be blank when it comes to AM settings, which means setting up everything from scratch for each, including frequencies.
It would also be nice to be able to change the remote mine for all frequencies in one go rather than doing that for each value being read. Particularly with Mori++ worlds there can be a whole lot of mines and picking one from the list is not a great UI experience.
It would also be nice to have the name of the mine written somewhere without relying on mouse over. That will help catching mistakes, which would otherwise be hard to spot in case two mines have the same icon.