I ride an Appy. NO expert, tho.
She has good bone and I like her hocks. Hard to tell, she is being pulled forward a bit in the side photo so makes her look a bit camped under in front legs. From the front view her knees look really big and good and good solid looking feet. Mac has solid looking feet too, but since his feet are really flat, he must be shod always. She has a longish back, typical of appys but believe it or not, this often makes for a more comfortable ride for the human.
Her shoulder is ok, the neck is a bit short and set on a tiny bit low, but not a problem for trail horse. Her hip is a bit rotated forward (see how tail is more on top of the croup than is typical). that is the ONLY thing that I would want to look at and ride for; to see if she can reach under herself or has any soreness there.
I like her slightly rangy look. She is under muscled in the photo but she strikes me as a horse that tends to leaness and that is good.
Wish there was a guarantee on the eyes. You could do the Chief Joseph ride, too!