He is a bit straight behind through the hock and stifle. His topline is decent although I would like to see the point of croup a bit further forward and less pronounced for a smoother transition from back to coupling. That being said, the strong back I
like can be a bit stiff, but will hold up well mileage wise.
The bottom of his neck is set correctly, but the top of his neck, tying into the withers, is a bit low. If he is doing stellar in dressage he has not been doing so for long as he does not show the muscle building that a horse working properly in dressage would show. His neck may be starting to turn over.. but I think not... so be careful that he is not being ridden front to back in a false frame.
His feet seem a bit small and his bone a bit light for a lot of hard jumping.. and his pasterns are a bit long in front. However, he IS a Thoroughbred and this is common to the breed. I would take a very good look at his feet to insure he has adequate thickness to his hoof walls. I suspect he may have thin walled feet which is more of a concern than the somewhat light character of his legs.
I like him, really. Having had a horse with thin walled Thoroughbred feet, I would be very fussy about that when looking at this horse to buy.