Here's a wild newbie theory or two - Both Erica and Katharine?(long dark hair in need of a makeover but could dance) both cheered at LSU, I believe. Perhaps Erica didn't like her and Black balled(Andy Griffith reference) her for no reason and she wasn't selected and they later learned that Erica did this.
The other being they chose to do no more cuts and decided since Erica was out with injury and not known if she would cheer this season they decided to release it and not make any more cuts.
three...maybe Erica blasted Kelly and Judi for Holly' s absence? ETA perhaps Pain meds are making her seem ok? Still not performing but didn't she at HOF Game?