Could I make a plea for a longer search text area?
Longer queries are difficult to see as they can be longer than the text area:
IE: ((@start <= 2015-11-25) or not @start or (@due <= 2015-12-02)) and not @done
I wonder whether you could give the search text area some more thought? I ask that because it would be good to have a query builder where you can drag and drop tags, dates and key words. Even if that doesn't pan out, the search area is going to be one of the main areas people will be in with large documents and could do with some more visual space.