Antenna ship detection.
I think that if antennas could detect ships like a sensor and activate a block when ships are and are not in range. They would be more versatile for PvP and faction wars. For example, if a neutral ship enters your territory and an antenna detects them it could send a display a warning message or if an enemy enters your antennas range it could turn itself to silent mode to protect itself from being destroyed or it could trigger sound blocks on your ship to alert you that an enemy is approaching which would be awesome. It would be one of those small details that would make the game feel more versatile.