Hope this works DD in a bit of a slump. I have a few more swings if needed. This is front toss with hitting coach.
I see three fundamental issues that I think should be fixed one at a time. I will list them in the easier order to fix:
1) She has "chicken-wings". Her elbows should be closer to 90°. That high back elbow when pulling down to slot will drop her bat-head. If it affects it 1/2", that is serious. Her back elbow goes higher, spreading them more right at launch. Her back elbow should largely be pointed down at the catcher's chest if they are in proper position.
Below are Danielle Stewart of Australia, in her stance, All-American Dani Gilmore going into load, and Gabrielle (Gabby) Maurice of UCLA. Dani and Gabby played for our Philippines National Team. Note that their back knee stays inside the back foot in the stance and through the load phase. Please note the elbows!
2) Cornbread mentioned a barred-arm. To an extent that is true, but she has no choice because she is really pulling the bat through with the front shoulder. Every swing is pulled with the front shoulder! She needs to learn to stay on the ball better, and release the topside appropriately by pitch location. Without a straight right arm, she wouldn't be able to reach very much. The other result is she is hitting too many balls on the end of the bat, not on the sweet-spot of the bat. No sweet-spot, less power.
3) She seems to lack training in hitting to all fields, in particular right-field. She is often attempting to hit the ball too far out front. The pulled front shoulder doesn't help that. I would work hard with her on hitting to RF and keeping her shoulder on the ball. (The other result is she is hitting too many balls on the end of the bat, not on the sweet-spot. No sweet-spot, less power)
There are some really nice things about her swing too, but they are being compromised. She comes to slot well at the back hip with the back elbow well. Her head stays on the ball. She has fairly good rotation.