I did not do anything in the meantime. Honestly, I pretty much assumed hold for re-review was a lost cause.
If you are worried about your picture, I guess you could always send a new one. I doubt that the picture quality made that much of a difference though. Mine was printed out on regular (not photo) paper and taped to the application.
For reference, my assigned date was Sept 22 but I am hoping to change it to a different day of the week.
"Our interviews are scheduled for Tuesdays, Thursdays, and Fridays only. Due to time constraints, please reschedule your interview as soon as possible. We will make every effort to offer you a convenient alternative time. "