I don't think MA will be getting updated anytime soon since the creator has more or less disappeared.
You do get used to the theme creator after a while. You can't delete images, but you can make them transparent so that you can't see them. Same thing to me. All the different parts of the theme (marquee, borders, cabinet, background, rom list etc) need to be there, in a sense, for the theme to function properly so I can see why you can't 'delete' those images from the theme. As I say though, you can make them transparent, so it's more or less like deleting the images.