Overall he is a nice looking boy.
From the profile shot his LS placement looks a little behind the hip, and his loin is a bit longer because of this... But the rest of his body structure looks pretty strong. His back is not roached, he just needs a bit of weight, I believe the same is true of his "hunters bump"... A bit more weight (not much) and more work and he should have a lovely strong looking topline.
His hinds look a bit sickle hocked to me too, which could be why his feet tend to flare a bit. Regular trims should prevent it from being an issue. His left front cannon has some rotation, which may cause odd flaring on that hoof as well, or not depending on whether it affects his movement.
There isn't anything that is really bad about this horse, a fine toothed comb might dig up a few more faults,, but overall a nice looking guy.