He has a very correct shoulder and a rather high neck set common to the breed. His back is straight but his point of croup is a bit behind his LS joint.. making his coupling a bit rough. Fact is, he almost looks like a "hunter's bump" but I suspect it is not. His croup is short and steep. He is straight thru the stifle and hock and he is sickle hocked. His hind end is a Draft horse issue.. as there are breeders who breed for this thinking (erroneously) it will give the horse more power when pulling.
These horses, if they do not gait (and most in this breed do gait)can be super dressaage horses. This one could go quite aways up.. but I think his over straight hind leg would stop him from being the best mover at the highest levels. Even if he gaited, I would go for it because it would help him to stay sound in his elder years. Fresians are good horses.