in #2 her head seems so small on her body. I'm really assuming you didn't do anything to make it appear that way, but it looks so odd to me. I realize her jacket is super poofy but also her neck seems very thick compared to her head.
#3 I feel like she is appearing squashed into the frame, I'd prefer more space above and below the top of her head and her chin.
Other than that I like them. I don't have a problem with the skin resurfacing since most teens don't have wonderful skin, but they sure would like to pretend they do - at least for their senior portraits.