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1: Broad Audience Feedback
This design emphasizes simplicity of the feedback collection process from a broad audience (i.e. public reception).
Jenny uploads her image and adds commenters. She can create/edit groups by dragging and dropping users around.
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This UI is potentially unsafe. So far, it doesn't present any way for the artist to easily retract a piece of work, or for a commenter to delete a comment. However, these features can be easily incorporated into the UI.
2: In Depth Feedback
This design targets depth of feedback for detailed, categorized reviews and directed critique from groups and individuals with domain knowledge expertise. It takes into account versioning and emphasizes categorization of feedback directly on the artwork.
Jenny uploads her work for review and gives it a title. 
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Jenny can explore the reviewer feedback entered above and filter based on reviewer group.
Analysis
Learnability
Two aspect of this UI may be a bit harder to learn for the reviewers and would benefit from clear affordance and information scent: 1) The scrollable timeline that updates the artwork comments, and 2) the clickable artwork area to input comments directly
Efficiency
Review of comments is efficient for the artist, as it is presented directly on the artwork and symbols and tags limit the to act on the feedback. Direct manipulation and comments entered directly on the artwork area is relatively efficient from an input perspective.
Safety
3: Integrated Feedback
This design aims for a higher level of interactivity and uses of complementary software such as photo editing and social networks for sharing.
Analysis
Learnability
This design may not be very learnable. It requires the artist to be familiar with both the art generation technology as well as the art sharing technology (e.g. Facebook). The art sharing technology in particular may be difficult for a new user to learn simply for sharing their art. Similarly, the commenters must be familiar with the art sharing technology (and may be required to have an account) in order to give feedback. However, it is expected that most artists and commenters are already familiar with networking applications such as Facebook.
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