I got 84% for my site https://myraah.io/index.php/visualmind/report/aHR0cDovL3BhZ2...
I usually visit page performance sites to get some tips on things to improve on the performance, I think that this is a great idea to have a score on the appearance as well.
I got "You can further improve it by using better images and considering little denser layout." as a tip to improve, it would be great if there could be more details on the feedback.