Image Folder structure improvement idea

Hi, I was wondering what is the reason behind that you can only use one image of each card? Why not just(I bet it aint that easy) change to what cockatrice or magicworkstation used where you had a folder for each set? This would also give you a bit better overview of what sets you are missing etc.
Keep up the awesome work
-Hapse
Keep up the awesome work

-Hapse