This should be an easy one, but have a huge impact. The assets tab on Episerver Commerce REALLY needs a link from the assets tab, to allow for editing the actual image. We have some custom properties on the image class to account for the fact that Episerver Commerce really doesn't have a good way of indicating what type of image it is. I think originally the Group text field is what was intended for this, but we have to many different typed of images to use a text field for this purpose. We required an enum dropdown list, which we added to the image class.
The only issue is, in order to edit this from the product you need to search for that image on the right hand side, which is a pain. It would be so much easier if you just added a link from the asset tab.
You can read more about this here.http://world.episerver.com/forum/developer-forum/Episerver-Commerce/Thread-Container/2016/7/edit-image-properties-from-commerce-managers-assets-panel/