Symbol highlighting is quite useful. However, it can also be a bit distracting at times.
A useful improvement would be the ability to toggle symbol highlighting on/off with the right-click context menu and a pull-down menu entry. The pull-down (or both) would provide the default key binding. That way if the user does not want to use the default key binding, they have the current binding as reference. This way they do not need research the command name to remap it.
Additionally, when selecting text, there is a clash of the symbol highlighting and the selected text highlighting. It would be useful to have the option to configure SE to remove symbol highlighting of a word (or words) if text is being selected. Then when the word is deselected, the symbol highlighting is re-applied.