My main concern when viewing the Waterfall in Evergreen is "how healthy is HEAD"
Obviously, due to delays, many boxes on the waterfall page are often In Progress. This means to get a general picture, I click back a few Versions until I get a general idea.
What would be much more useful is if I could get a composite view which showed the pass/fail rate of each task from the last run where it completed. It wouldn't represent a particular Version, but it'd show the latest status of each task, without me having to navigate or click around.