You can't honestly judge conformation with horse in his winter woolies,it hides things, gives fullness to areas there isn't,makes them appear to have more bone than they do,makes head & necks look bigger,butts higher etc.
He is a young horse still growing you come back in a few months when he sheds & matures some more and you will have a better idea of his conformation.
.Overall from the pics posted I think he's pretty cute!
besides being cowhocked don't see any big glaring faults.
My first thought though, when seeing horse was that it was a yearling based on look of maturity & the tail ,was he a late born foal?