Featured image box ratio

Hello guys. Thank you for the last update. Is it possible to make the featured image box more simple, like for example giving the option to choose between the most common ratios, e.g.: 1:1, 3:2, 2:3, 16:9, 9:16, 4:3, 3:4… and so on? I find it very difficult to understand the logic behind the current options in order to make all my featured images to look the same height and same weight. Maybe the solution is there, but I am not able to see it: if I choose pixels as a unit it will probably vary according to different screen widths. If I use % like for example width x height 200×100 it doesn’t change accordingly.

Thank you in advance,

PS: Also Gutentor continues to show errors when using FIFU (featured images from URL) plugin for the featured images. I have already reported this problem.