I would like to see a way to markup with editing notes. This would be a great feature for the mobile Lightroom CC with the iPad, to use the pencil to circle and highlight areas. This way if you are trying to collaborate or review edits before going into detail with photoshop / lightroom.
how it would work:
There would be a markup button that would enable to highlight by circling an area to signify desired future edits. Example: Circling an area to brighten, darken, sharpen, blur, or add color adjustments. After circling an area a prompt for text input to add a comment (e.g. +1 stop, or darken area). This would sync up with Lightroom library and can be shared across CC library. When adding into Photoshop it would add as a separate layer.
When selecting the area, it would add an area transparent modification such as lighten or darken an area, or adding a color hue to make a rough sketch of the desired look. When adding into photoshop these areas would be added as separate layers with AI subject areas selected as a layer mask that may assist with making quicker edits.