I actually dislike the zero-click data. I think it's impressive from a technical standpoint, but ultimately it just gets in the way of my searches. When I'm searching, I already have a general idea of what I'm searching for, so the zero-click info isn't very useful, and also leaves less room on the page for search results.
To give a concrete example: I was following a discussion online about a show called Archer, and someone said it was basically Frisky Dingo except not as good. So when I do a search on DDG for Frisky Dingo, the zero-click results didn't do me any good. I already figured it was a cartoon show on Adult Swim, I wasn't interested in "American animated television series distributed by Madman Entertainment Category" or "More related topics", I wanted something more relevant. I have to wonder how often people click on any of the links in the zero-click box.
Edit: you called it a "decision engine", which is both accurate and why I don't like DDG as much as Google. I want a search engine that reads my mind. When I do a search for "django", I want the framework, I don't want films/musicians/etc. Google reads my mind and DDG doesn't.