He's got a decent shoulder, nice short back, the straight croup typical of Arabs. He is overconditioned, as you are well aware.
His front cannons appear offset, but if could be the way he is standing. His hind legs are a tad strung out behind, but not too bad; and again, could be more the way he is having to stand, with the excess body conditioning.
I would like a more refined head on him, but he does have a decently refined trim neck, even with the weight he's carrying; I think he will look even more lovely when you are able to get him more muscled up, and the excess pudge's off. He's a cute guy...I like Arabs!