The inline search is a really great feature when you want to quickly find text.
If there were keyboard shortcuts to toggle case sensitive, whole words and regular expression it would be even quicker as I would not have to reach for the mouse for that.
You already use the existing shortcuts for “replace and find next” and “replace all”. My suggestion is to add new shortcuts for the three inline search toggles so that people can set them.
Finding a key combination that is not already used is another problem but at least it would be possible 😉