I would really love the option for changing the audio in Individual Clips.
I recently needed to do a great deal of audio->video syncing. Auto Sync Audio didn't work, so I did this with a combination of in-timeline Align Audio, plus manual work. I ended up with my original video clips laid out against the synced external audio, with each external audio clip matching the original video clip length.
Because there's no way to embed these manual syncs (another feature request), what I really wanted to do then was Individual Clip render these video clips, adding in the synced external audio. But of course there's no way to do that. I would have had to do dozens of Single Clip renders, with manually set in/out points, or the Compound Clip + recreate the cuts.
In terms of implementation:A simple Audio dropdown in Individual Clips mode. Default to "Embedded Audio", as now. Then a new option for "Use Timeline Bus X" or similar. Plus the tickboxes for "Render one track per channel" and "Render as discrete audio tracks"
The logic would be: for each video clip on this timeline, ignore the embedded audio and instead take the audio from the selected Bus for the duration of the video clip.
This feature would have saved me a lot of time and hassle in my recent project.
EDIT: I just realised this thread isn't in the Feature Request forum. Added my suggestion to
this existing FR thread. +1 it there if you also want this