An important step in the UX process is to implement the improvements from your learnings, based on your own observations, along with user feedback. Whilst making widespread changes to the prototype was outside the scope of this project, it was necessary to at least go through this process. The second iteration of the prototype was at the below link.
The two visual changes are shown below (the actual physical features are not, due to time constraints), with us having a more visual on/off on preferences so that the user can see which shows their preferences.
We also put the offer into the star, as people that used the prototyped found that this slowed them down in finding the offer (why hide it in an image).