My two cents worth, and Kyle and I have discussed it on MSN... I'll throw it out and hopefully TFOX or RJ will chime in...

I think the draw length is basically fine. if anything, I would lengthen it 1/4".

I also believe that if he were to bend his arm more, this would drop his shoulder down easier and would bring his release hand slightly forward on his face more.

I don't know that he's necessarily leaning back, he may be pushing his hips forward. I had the same problem awhile back. It was more of an alignment issue than a draw length issue.