I have watched that clip about 50 times, and I don't think I have ever seen anyone her age or size with that good of mechanics with power/resistance through release. Great job.
I prefer the opposite. Arm goes back; body moves forward.
Really don't want to offend anyone, but all kids that use a backswing should have the forward momentum of their body terminate the "back" in backswing.
Your kid is very coordinated. She play a lot of sports? Appears so.
I would recommend learning to drive rather than just stride. She would benefit from lower body drills like pushbacks, jump backs, etc. She's an attacker... seems foolish to not maximize that incredible coordination... she is obviously in very good hands. Keep it up.
I have watched that clip about 50 times, and I don't think I have ever seen anyone her age or size with that good of mechanics with power/resistance through release. Great job.