image.style.large.yml contents are:
name: large label: 'Large (480x480)' effects: ddd73aa7-4bd6-4c85-b600-bdf2b1628d1d: id: image_scale data: width: 480 height: 480 upscale: true weight: 0 uuid: ddd73aa7-4bd6-4c85-b600-bdf2b1628d1d langcode: en
In some ways this is not a problem because the use of the UUID is totally internal to the image style. It just exists so that there can be multiple effects of the same type - ie. you can added another image_scale transformation to this style. However this shows us that we really have a naming problem here where
id: image_scale is not really an identifier but it is an effect type. And we're are just using UUID as a convenient way of generating a unique ID.
Depends on what we decide.
Decide if we need to change this.
User interface changes
admin/config/media/image-styles/manage/large/effects/ddd73aa7-4bd6-4c85-b600-bdf2b1628d1d will change