I really like him. I don't agree with him being long backed either, it's rather proportionate in relation to his bottom line. The only thing I could really pick on him for is his topline, but he's young and that will improve with conditioning.
His head is very pleasing to the eye. Love it in the first shot especially. His ears are a perfect size for his head and his eyes are very kind.
I have a 14 wk old bay going gray colt, interesting to see another that started bay & the color at his age. Good looking boy, I'd welcome him in my pasture :)