I would be cool if that circled 17 would be really exaggerated. Really circle that 17 it would make it look more argent. Possibly add pointing arrows or maybe add in the pen you would use to circle the 17.
The added color really makes this pop.
The color definitely makes this feel more complete and engaging.The rubber band starts the eye off on a nice diagonal right through the circled date to the post-it. I like the subtle use of perspective as well.