This is a common misconception about the release point. It is about sooner or later but best described by front or back. It is about the location of the point of release which a common adjustment for elite level pitchers. Reps with the incorrect release point/location is counterproductive.
A rolloever can certainly be thrown without contortion or injury. Thrown properly it is easy to throw and a very effective pitch.
It is very good when she throws it correctly but she is releasing it late.