Westwind ... re-read MTS's comment to you ... "The hands have to remain back as the front side starts to open to create stretch in the torso....". MTS is basically speaking of "Stretch and Fire".
Your daughter has virtually zero 'stretch'. Your daughter does not 'setup' to establish 'stretch', nor does she create 'stretch'. In the swing sequence of Coil-Stretch-Separate ... your daughter lacks the 'stretch' ... and as a result there is little to no 'separate' either. Your daughter's swing lacks 'Stretch and Fire' mechanics.
The issue as I see it is with your daughter's sequence and her failure to establish 'stretch'.
Let's see if we can help you visualize things a bit better. I've added horizontal lines to the 'shoulder' & 'hip' lines below. See if you can notice how the 'hip line' is rotated well ahead of the 'shoulder line'. That's the 'separate' in the 'Coil-Stretch-Separate' sequence. Then re-read MTS' comment to you ... "The hands have to remain back as the front side starts to open to create stretch in the torso....". That additional 'stretch' leads to an explosive 'firing' of the barrel ... and hence the term "Stretch-and-Fire".
IMO your daughter would benefit greatly by understanding and following a simple sequence ... Coil-Stretch-Separate.