So let get this straight, after 13 pages nobody can agree what the front elbow is suppose to do? No wonder there are so many screwed up swings out there. Good luck I hope that you will be able to come to common ground, It get's really tiring reading about who's better than who depending on what...
good for her, i have my hitter having the front toe in line with the ball of the rear foot. Which is about 2" to 3", now you will have to do alot more reps, to reinforce muscle memory.
one thing that will help your dd by opening up her stance is she will be getting a good 2 eye look at the ball. In other words she will be seeing the better off the pitchers hip.