Frontpage - card layout - post cover position

Hello there, really loving the card layout. I'm wondering if it's possible to adjust the image so the display makes more sense. For example when I use a picture with a face it only shows half of it and the top is missing, no matter which size I use. I would be really nice to be able to drag the picture to the right position. Or do I have to use some set size to be sure the the image displays ok?