Often, when inserting B-roll into a timeline, I want see if the audio is important, and/or usable. If not, I want to delete it. The current method is to alt+click or alt+click+drag on only the audio clip(s), then press delete. It would be far easier to have a shortcut that only deleted audio of all the currently selected clips.

Furthermore, the opposite would also be useful. Sometimes, I want to get back the audio from clips after I've deleted it off the timeline. My current solution is to position the playhead over the clip, click on it, hit the shortcut for Match Frame, and then click and drag the clip, with its video and audio, out of the source monitor and onto the timeline.
A single shortcut to "overwrite audio" would make this much easier. ("Insert" would imply moving over all the clips downstream) It would place the audio clip(s) according to the source patching, and would become linked, and match the in/out points, and the speed, of the video clip(s) in question.

These are unique ID 91.0 and 91.1 on my problems spreadsheet:
https://docs.google.com/spreadsheets/d/1dVJb7kI_ZETLavrplfARgn9gL8HUpvkq6A0jCPxqA3w/edit#gid=1133868629

Boring details:
If there is no source patching, the lowest targeted track should be used. If there is no track targeting, the bottom-most empty track should be used. Don't simply refuse to work -- if the user pressed that button, they want to get that audio. They can hit UNDO if it was accidental.
If there are multiple video clips that would have overlapping audio, the audio should be placed lower or higher, (mirroring the position of the video clips,) to avoid the overlap.