I can't say I'm good enough to give a completely accurate critique, especially with only one picture with a saddle on, but here's my attempt.
Overall, I really like him. He looks balanced, proportionate. His pasterns are nice and short, his cannons are a good length, and I'm debating whether he's sickle hocked or not... you'll have to wait for a more knowledgeable person for that one, lol. He has a pretty straight shoulder, his back looks a little long to me although it's very hard to see in this picture with a saddle. And not to mention, he has the cutest face and ears. I want to hug him, lol.