It would be nice if one could display the query results not only in a tree view, but also in a multi-column list view. For example, if the query ends with "select c, n, n * 10, Replace("my custom {c} string", c), there should be four columns for every result found, whereas the fourth column (in this case) is calculated string.

Sure. This one for example:

from Package p, int loc
where p.fromSource()
  and loc = sum(CompilationUnit cu |
                cu.getPackage() = p |
                cu.getNumberOfLines())
select p, loc

It'd be nice to see the name of the package and the LOC number right next to it at the same time, without the necessity to expand the tree node. Overall, each query that returns a list of tuples would most probably benefit from this new representation, because each tuple from the result maps nicely to a row of the list view, each value filling a separate column. This one wouldn't need to expand the nodes of interest. Besides, with a tree, a lot of screen real estate to the right of the tree gets basically wasted, unless the node names are very long. Multi-line list view would probably help to organize information more efficiently.

And I don't mean that tree view is bad or something, it's just it would be nice to have something else as well. But I guess this must be a low priority feature - there probably are lots of more important things to do right now.

Keep up the good work!

WOW, that was fast! It works exactly like I was imagining. Thanks!