make Simplify Sequence also flatten audio in a multicam clip

Simplify Sequence is wonderful for flattening the video tracks when I create a multicam sequence. It would be incredibly useful if it could also flatten the audio tracks. Cameras nowadays record 5 or more tracks of audio that never get used anyway. Manually flattening those can be cumbersome. Ex. if a multicam clip has 20 clips with 5 channels of audio per clip, that's 100 audio tracks that I have to manually flatten.

Also, is it possible to simplify into the multicam sequence? I always have to carefully copy & paste the simplied clips from the simplified sequence into the multicam sequence.