The Diagnostics tool could be SO much more effective and would save me literal hours when editing audio. Some suggestions related to the Diagnostics tab:
When marking audio, there should be an option to delete all the audio that has been marked with range markers. Or, there should be a way to select all of the ranged markers at the same time in the waveform editor. This would allow for not having to select a marker to grab the range in the waveform editor, switch windows to the waveform editor, then hit "delete," then go back to the markers window to select the next one. In 5 minutes of recorded audio it is easy to rack up to 50+ markers and having to switch windows each time is extremely painful time consuming.
The delete audio should be accompanied by a "mute audio" option. Sometimes I use this tool to scan for small breaths or weird noises between takes that I don't necessarily want to just shorten or delete, but instead lower to a specified level.