You guys will argue anything, lol.
There does need to be some kind of ground reaction force to hit the ball hard, just not the same as baseball.
And rdbass, since your a hitting expert now, among everything else, maybe you can post an updated swing of your daughter??
SNF:
Sorry for getting off topic.
The hardest part when doing the SNF is being able to swing out from your body. Most want to swing around their bodies. This might help try Attack Opp. Set the tee up for outside pitches. Then practice hitting line drives opposite field. Helps with getting the 'feel' of swinging out from your body. Resist the shoulder rotation.
Picture the hitters feet 45/open and you get the feel.