Hello @2020media ,
Thank you for reporting this. I can understand the current grid view offers a very wide landscape ratio for featured images. Often promotional images are relatively squarer. We will add an option to set custom image height in an upcoming release. That should give you more control over the grid view.
I just want to add that Staggered Grid view does not have height constrains on image and maybe you can try it too, to see if it suits your requirements.
Feel free to ask questions.