Add ability to add a description or a caption as a separate piece of metadata for a photo. Possibly it could be part of Album metadata. The lack of this feature prevents me from migrating multiple albums from Google Photos.

There are some suggestions to display captions or descriptions from EXIF stored with photos. Doing it that way would change the modified by date etc if a user wanted to change those; also updates would require de-encryption/re-encryption, adding challenges to de-duping and burdening the user flow. On the other hand if my suggestion is implemented, then those who wanted EXIF captions displayed could have that feature added as a toggle/checkbox since the UI elements for it would already be solved.