I was working with a 12U ASA girl last month and I asked her about icing her shoulder and her dad said that he had "never heard of it." He is her coach. I thought that that was kind of basic knowledge, but I guess not.
I'm a pitcher and didn't know that. I've always just kept it warm and only really iced it when injured. (which is probably why I KEEP having shoulder issues)
battsleft good luck with your DD. If you're going to stay with the same PC I would just focus on her mechanics with the PC at this time. To fix her lean you could always stand behind her and hold her head. (my mother did this to me at 11!) A slow walkthrough does wonders.