When moving linked media up or down to new tracks, the attached media should also move up or down.
When video is moved up or down to a new track, the attached audio should also move up or down the tracks. For example, if I have linked clip on V1 and A1 and move the video up to V2, the audio on V1 should move to V2.
This idea was posted another time and has 11 votes, just to say that there are many people who want this feature to work as it used to in FCP7
This is a handy feature in many cases, I would just say, add a hotkey in the mix. For example "Shift+Drag video clip to new track" moves both video and the linked audio clip to the next track.
Fran Roig commented
Thanks for posting your idea.
Usually we tend to leave audio in the same audio track because most editors like to work with specific audio tracks, such as: A1-A2 for voice overs, A3-A4 for SFX, A4-A5 Music, etc...
But let's wait if other people vote your idea!