I'd give her time and see what she does. My first colt was barely 14 hands at 2 1/2 (parents were 14.3 and 15 hands), I thought he'd just be a small horse, and although I'd hoped he'd be 'for me' I had lots of nephews and he definately had the temperment to be a great kid's horse! So imagine my suprise when he topped out around 16 hands (turned out all the foals from that mare were late bloomers). My next colt was a year younger (parents were 15 and probably 15.2) he was 15.1 at 2 1/2, and also topped out around 16 hands (side note, this one was an appy), so you just can't tell til they get there!
On another note, other then the 3rd pic, I don't think she looks freaked at all, and I'm not an appy person (the one previously mentioned was the only one I ever had, and he didn't have appy eyes), and for sure don't like to see whites in the eyes (not ment offensively, just a preference).