Your dashboard gave me some interesting food for thought, so I'll do the same and share with you, some of the things that I'm working on, that you are free to incorporate into openbase.
My focus is not on the discovery part, which you guys are working on, but rather, I'm more focused on providing "business intelligence" for the software development lifecycle.
I do agree with you that code metrics can only tell you so much, as it's not really meant for discovery. Code insights might provide things like stability, investment, complexity, etc., but like you said, you can't tell from code insights, if the code is easy to use or not. Discovery is a serious problem and GitHub has certainty not solved this problem yet, so what you guys are working on, is a problem worth solving in my opinion.