That's a problem I was trying to improve in my c2 interface proposal. If it was possible to pan an zoom the events' window with middle mouse button and scroll wheel, the events could be more readable in a single line and construct could have a faster workflow. That would be one of the biggest benefits of using an openGL drawn interface like blender's.
I have a quick mockup based on some studies I made on the event editor.
full image: http://www.prr-art.com/things/c2-interface-02.png
I used a mockup of another window as the base so the side panels and some menus don't necessarily have relevant content for the event editor, but is possible to have an idea of some of the features that could help improve the general usability, like color marked events, quick event/condition/expression toggle, cleaner look, visual clues for "add conditions/...", etc.
Imagine those big eventsheets where you could zoom out to see the whole thing and easily identify the blocks of code by color, then move to the desired place and zoom in again, but just the amount that's enough to fit the area that you want to work on while still having a good redability. Combining this with acessible pan functions, the screen size would not be a problem anymore.
With the release of construct classic by members of the community maybe I can still propose some improvements that still apply to the old interface.