#4 Ember Moon
Moon was destined for greatness from the very beginning when she was in NXT. Her callup on the main roster was met with reluctance, as the fans feared that she would be just another NXT call-up who would be wasted on Monday nights.
Unfortunately, the fans were right. Ember Moon was showcased for a while with the premier women on Raw like Sasha, Nia and Bayley, but she was soon sidelined after that. Ember Moon has done absolutely nothing of worth since then and will soon fizzle out if she isn't sent to SmackDown for some serious character development.
Ember has tons of potential and just needs to spend a year on the blue brand so as to grow into a credible opponent for the women on Raw's main event scene. Once she regains her credibility, she can be switched back to Raw immediately on next year's Shakeup.