Concur.
I say get that barrel against the top of her pony tail and swing from there.
I personally don’t like how her knees start so far inside her feet. Looks very mechanical and restricted to me. Looks over coached to be frank. (ETA: Was typing the same time as bobbyb. Think we are seeing the same thing. Call that dude.)
I have not been following your dd’s progress or what advice you have been given. I’m going to say this: I like a whole lot about her swing. I can tell you have been working hard with her and just from the video it looks like she is trying to do it. I fear you have arrived solidly at paralysis by analysis. I say quit it. Relax about the mechanics for awhile, especially the minuscule details. Instead: Focus on hitting good pitches hard. Get her out on a field and front toss to her and have some fun. Hit with intent. Emphasis on attacking good pitches. There are a whole lot of very good hitters that don’t pass the technical forum swing analysis eye test.
Don’t make this harder than it has to be. It’s hitting a rock with a stick.
This is great advice!! And I have been there myself...