Rather than introducing a new keybind, enhance the UX for the History tab and\ allow users to post-process their transcribed text after speaking.

Feel like this would add value without complicating the user experience, and potentially alleviate the user from either realizing in their their current "rant" or "ramble" that they should've hit the keybind for enhanced transcription, and/or users who look at their transcription afterwards and realize it can cleaned up further for "jargon fillers" and potentially distilled down into a much cleaner stream of thought.