I will take the position and equipment approach for this one. Keep a couple things in mind. I am a big fan of Mr. Reed. I think he is an awesome athlete and it is great that he posts here from time to time when knuckleheads like me try to 'tear him down'. Also keep in mind that his position has been the topic of discussion before, I think more than once. I am not the only guy who think his position is a bit wacked.
The argument is something like "Who the hell are you?" or "It works for him!" Sure, sure, of course it does. The question is would something else work better?
On to your challenge.
1. By far the largest issue is the down angle to his arms. (positional issue and aero concern. The man is all "scoop")
2. Straw length (equipment)
3. Vents on helmet (maybe it was hot?) (equipment)
4. Round bottle on downtube (equipment)
5. Head could be lower (positional)
These are small things that are easy to spot from the first pic I found of him doing a quick search. Perhaps in the end, none of these things would need to be modified. He is however giving up speed from some of them. Whether there is a good trade off for him in other areas would be the question. But if you think pros or Olympians or world champions are doing everything right, or if you think someone slower than you can't offer good advice, you are not using all the resources at your disposal. Jack is a great resource.