I think he is a nice colt. He has a nice sloping shoulder. I am not worried about his pasterns at all. When he is done growing they will be just right. I wouldn't worry about how high his hocks are off the ground at this point either. He has a lot of growing to do yet. I prefer a little higher neck set than he has. He has some nice carry down through the hip to the gaskin, but he does look a little goose rumped to me.
For what you are going to use him for, I think he will be fine conformationally.

Life's tough, it's even tougher if you're stupid. - John Wayne

You can't argue with stupid!