I must say that this is the best related post plugin available right now.
It will be great if you can add more styles. On such style I can recommend is images in circular style. I think they will do great.
Now let's talk about the problem I am facing right now. When I select Pinterest inspired style to show related posts the plugin shows more than the selected number of related post. I thought there might be issue with the theme so I tested with various theme but I am still facing the same problem.