The new ability to embed a collection with the mosaic presentation is great, except users can't just expand a picture without going to a separate URL. If the photos simply expanded when clicked, just like the images do at the top of stories, readers wouldn't have to load a new URL or leave their spot in a story.
It's a jolt in the experience when the page moves to a new URL. It forces users to hit "Back" to finish reading the story, and is disruptive as-is. Mimicking the features the photos display at the top of the page would fix this.
Customer support service by UserEcho