As she stands, she is leaning forward so her shoulder appears a bit steep though her neck ties in nice and high to help compensate. Also.. the photo makes it difficult to judge her hind leg angles and I suspect she may be a bit straight through the hock if set up so you could drop a plumb line from the point of buttock throught the point of hock and down the back of the hind cannon.
With her leaning forward she also looks a bit down hill (she is butt high.. but the line from the point of buttock to the root of the neck is nearly level. However, a butt high horse will be more difficult to collect and get working off her hind legs.
Take some weight off her and get a photo of her standing with her legs closest to the camera plumb (and her legs away from the camera with the front legs slightly back and the rear leg slightly forward.. space to the knees and hocks).
I would be very interested to see this horse again posed like this and thinner.
Agree that she needs a hoof trim (in this photo).
BTW if anyone had asked me to guess the breed I would have said Hackney or Morgan cross... :)