It is a cool idea, but there’s just so many tricky parts with editing in the reviewer, that I won’t look into it anytime soon. There’s too many other things I’d rather implement in the add-on.
If you up for trying something else, you can look into Persistent Editor, which won’t let you edit in the reviewer, but rather keeps the Editor window open and go along with the reviews, which means you don’t have to continually open and close it (there’s a gif demonstrating it). As you’re still using the editor, you can also the shortcuts in this case. (Disclaimer: I am the author of this add-on as well)